Z85230/Z80230
Enhanced Serial
Communications Controller
Product Specification
PS005303-0907
Copyright ©2007 by Zilog
®
, Inc. All rights reserved.
www.zilog.com
Z85230/Z80230
Product Specification
Warning:
DO NOT USE IN LIFE SUPPORT
LIFE SUPPORT POLICY
ZILOG'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE
SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF
THE PRESIDENT AND GENERAL COUNSEL OF ZILOG CORPORATION.
As used herein
Life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b)
support or sustain life and whose failure to perform when properly used in accordance with instructions for
use provided in the labeling can be reasonably expected to result in a significant injury to the user. A
critical component is any component in a life support device or system whose failure to perform can be
reasonably expected to cause the failure of the life support device or system or to affect its safety or
effectiveness.
Document Disclaimer
©2007 by Zilog, Inc. All rights reserved. Information in this publication concerning the devices,
applications, or technology described is intended to suggest possible uses and may be superseded. ZILOG,
INC. DOES NOT ASSUME LIABILITY FOR OR PROVIDE A REPRESENTATION OF ACCURACY
OF THE INFORMATION, DEVICES, OR TECHNOLOGY DESCRIBED IN THIS DOCUMENT.
Z I L O G A L S O D O E S N O T A S S U M E L I A B I L I T Y F O R I N T E L L E C T U A L P R O P E RT Y
INFRINGEMENT RELATED IN ANY MANNER TO USE OF INFORMATION, DEVICES, OR
TECHNOLOGY DESCRIBED HEREIN OR OTHERWISE. The information contained within this
document has been verified according to the general principles of electrical and mechanical engineering.
Z8, Z8 Encore!, Z8 Encore! XP, Z8 Encore! MC, Crimzon, eZ80, and ZNEO are trademarks or registered
trademarks of Zilog, Inc. All other product or service names are the property of their respective owners.
PS005303-0907
Z85230/Z80230
Product Specification
iii
Revision History
Each instance in Revision History reflects a change to this document from its previous
revision. For more details, refer to the corresponding pages and appropriate links in the
table below.
Revision
Level
Date
Description
Updated
Figure 38
and Implemented Style
Guide
Editorial Updates
Original Issue
Page No
All
All
All
September 2007 03
November 2002 02
August 2001
01
PS005303-0907
Revision History
Z85230/Z80230
Product Specification
iv
Table of Contents
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pins Common to Both the Z85230 and Z80230 . . . . . . . . . . . . . . . . . . . . . .
Pin Descriptions Exclusive to the Z85230 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Descriptions Exclusive to the Z80230 . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
4
6
6
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Input/Output Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ESCC Data Communications Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . 15
Z80230/Z85230 Enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-Byte Transmit FIFO Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-Byte Receive FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Write Register 7 PRIME (WR7’) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CRC Reception in SDLC Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TxD Forced High in SDLC with NRZI Encoding When Marking Idle . . . . . .
Improved Transmit Interrupt Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DPLL Counter Tx Clock Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Read Register 0 Status Latched During Read Cycle . . . . . . . . . . . . . . . . .
Software Interrupt Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fast SDLC Transmit Data Interrupt Response . . . . . . . . . . . . . . . . . . . . . .
SDLC FIFO Frame Status Enhancement . . . . . . . . . . . . . . . . . . . . . . . . . .
FIFO Enable/Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIFO Read Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIFO Write Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SDLC Status FIFO Anti-Lock Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initializing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Write Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Read Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Z80230 Interface Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Z80230 Write Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Z80230 Read Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Z80230 Interrupt Acknowledge Cycle Timing . . . . . . . . . . . . . . . . . . . . . . .
Z85230 Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Z85230 Read Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Z85230 Write Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Z85230 Interrupt Acknowledge Cycle Timing . . . . . . . . . . . . . . . . . . . . . . .
22
22
22
23
26
26
26
27
27
28
28
28
30
30
31
31
32
32
32
53
70
70
71
71
72
73
73
74
PS005303-0907
Table of Contents
Z85230/Z80230
Product Specification
v
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Test Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Z85230 AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
75
75
75
76
76
77
77
86
Z80230/Z85230 Errata . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
IUS Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
IUS Problem Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
RTS Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
RTS Problem Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Automatic TxD Forced High Problem Description . . . . . . . . . . . . . . . . . . . 101
Automatic TxD Forced High Problem Solutions . . . . . . . . . . . . . . . . . . . . 102
SDLC FIFO Overflow Problem Description . . . . . . . . . . . . . . . . . . . . . . . . 102
SDLC FIFO Overflow Problem Solution . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Default RR0 Value Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Default RR0 Value Problem Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Default RR10 Value Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . 103
Default RR10 Value Problem Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
CRC Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
CRC Problem Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Z85230 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Part Number Suffix Designation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
PS005303-0907
Table of Contents
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