SyncMOS Technologies International, Inc.
SM8954A
8-Bits Micro-controller
With 16KB flash & 1KB RAM embedded
Product List
SM8954AL25, 25MHz 16KB internal flash MCU
SM8954AC25, 25MHz 16KB internal flash MCU
SM8954AC40, 40MHz 16KB internal flash MCU
Features
Working Voltage: 3.0V ~ 3.6V For L Version.
4.5V ~ 5.5V For C Version.
General 8052 family compatible
12 clocks per machine cycle
16K byte on chip program flash
1024 byte on-chip data RAM
Three 16 bit Timers/Counters
One Watch Dog Timer
Four 8-bit I/O ports for PDIP package
Four 8-bit I/O ports + one 4-bit I/O ports for
PLCC or QFP package
Full duplex serial channel
Bit operation instruction
Industrial Level
8-bit Unsigned Division
8-bit Unsigned Multiply
BCD arithmetic
Direct Addressing
Indirect Addressing
Nested Interrupt
Two priority level interrupt
A serial I/O port
Power save modes: Idle mode and Power
down mode
Code protection function
Low EMI (inhibit ALE)
5 channel SPWM function with P1.3 ~ P1.7
Description
The SM8954A series product is an 8 - bit single chip
micro controller with 16KB on-chip flash and 1K byte
RAM embedded. It is a derivative of the 8052 micro
controller family. It has 5-channel SPWM build-in.
With its hardware features and powerful instruction set,
it’s straight forward to make it a versatile and cost
effective controller for those applications which
demand up to 16 I/O pins for PDIP package or up to 36
I/O pins for PLCC/QFP package, or applications which
need up to 16K byte flash memory for program data.
To program the on-chip flash memory, a commercial
writer is available to do it in parallel programming
method.
Ordering Information
yymmv
SM8954AihhkL
yy: year, ww: month
v: version identifier{ , A, B,…}
i: process identifier {L=3.0V~3.6V,C=4.5V~ 5.5V}
hh: working clock in MHz {25, 40}
k: package type postfix {as below table}
L:PB Free identifier
{No text is Non-PB Free，”P”is PB Free}
Postfix
P
J
Q
Package
40L PDIP
44L PLCC
44L QFP
Pin / Pad
Configuration
Page 2
Page 2
Page 2
Dimension
Page 20
Page 21
Page 22
Taiwan
6F, No.10-2 Li- Hsin 1st Road ,
Science-based Industrial Park,
Hsinchu, Taiwan 30078
TEL: 886-3-567-1820
886-3-567-1880
FAX: 886-3-567-1891
886-3-567-1894
Specifications subject to change without notice contact your sales representatives for the most recent information.
1
Ver 2.1 SM8954A 08/2006
SyncMOS Technologies International, Inc.
Pin Configuration
SM8954A
8-Bits Micro-controller
With 16KB flash & 1KB RAM embedded
Specifications subject to change without notice contact your sales representatives for the most recent information.
2
Ver 2.1 SM8954A 08/2006
SyncMOS Technologies International, Inc.
SM8954A
8-Bits Micro-controller
With 16KB flash & 1KB RAM embedded
Block Diagram
Specifications subject to change without notice contact your sales representatives for the most recent information.
3
Ver 2.1 SM8954A 08/2006
SyncMOS Technologies International, Inc.
SM8954A
8-Bits Micro-controller
With 16KB flash & 1KB RAM embedded
Pin Description
40L
PDIP
Pin#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
44L
QFP
Pin#
40
41
42
43
44
1
2
3
4
5
7
8
9
10
11
12
13
14
15
16
18
19
20
21
22
23
24
25
26
27
29
30
31
32
33
34
35
36
37
38
17
28
39
6
44L
PLCC
Pin#
2
3
4
5
6
7
8
9
10
11
13
14
15
16
17
18
19
20
21
22
24
25
26
27
28
29
30
31
32
33
35
36
37
38
39
40
41
42
43
44
23
34
1
12
Symbol
P1.0/T2
P1.1/T2EX
P1.2
P1.3/SPWM0
P1.4/SPWM1
P1.5/SPWM2
P1.6/SPWM3
P1.7/SPWM4
RES
P3.0/RXD
P3.1/TXD
P3.2/#INT0
P3.3/#INT1
P3.4/T0
P3.5/T1
P3.6/#WR
P3.7/#RD
XTAL2
XTAL1
VSS
P2.0/A8
P2.1/A9
P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13
P2.6/A14
P2.7/A15
#PSEN
ALE
#EA
P0.7/AD7
P0.6/AD6
P0.5/AD5
P0.4/AD4
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
VDD
P4.0
P4.1
P4.2
P4.3
Active
I/O
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
o
i
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
o
o
I
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
Names
bit 0 of port 1 & timer 2 clock out
bit 1 of port 1 & timer 2 control
bit 2 of port 1
bit 3 of port 1 & SPWM channel 0
bit 4 of port 1 & SPWM channel 1
bit 5 of port 1 & SPWM channel 2
bit 6 of port 1 & SPWM channel 3
bit 7 of port 1 & SPWM channel 4
Reset
bit 0 of port 3 & Receiver data
bit 1 of port 3 & Transmit data
bit 2 of port 3 & low true interrupt 0
bit 3 of port 3 & low true interrupt 1
bit 4 of port 3 & Timer 0
bit 5 of port 3 & Timer 1
bit 6 of port 3 & ext. memory write
bit 7 of port 3 & ext. memory Read
Crystal out
Crystal in
Sink Voltage, Ground
bit 0 of port 2 & bit 8 of ext. memory address
bit 1 of port 2 & bit 9 of ext. memory address
bit 2 of port 2 & bit 10 of ext. memory address
bit 3 of port 2 & bit 11 of ext. memory address
bit 4 of port 2 & bit 12 of ext. memory address
bit 5 of port 2 & bit 13 of ext. memory address
bit 6 of port 2 & bit 14 of ext. memory address
bit 7 of port 2 & bit 15 of ext. memory address
program storage enable
address latch enable
External access
bit 7 of port 0 & data/address bit 7 of ext. memory
bit 6 of port 0 & data/address bit 6 of ext. memory
bit 5 of port 0 & data/address bit 5 of ext. memory
bit 4 of port 0 & data/address bit 4 of ext. memory
bit 3 of port 0 & data/address bit 3 of ext. memory
bit 2 of port 0 & data/address bit 2 of ext. memory
bit 1 of port 0 & data/address bit 1 of ext. memory
bit 0 of port 0 & data/address bit 0 of ext. memory
Drive Voltage, +5 Vcc
bit 0 of Port 4
bit 1 of Port 4
bit 2 of Port 4
bit 3 of port 4
H
L/-
L/-
L
Specifications subject to change without notice contact your sales representatives for the most recent information.
4
Ver 2.1 SM8954A 08/2006
SyncMOS Technologies International, Inc.
SM8954A
8-Bits Micro-controller
With 16KB flash & 1KB RAM embedded
Special Function Register (SFR)
The address $80 to $FF can be accessed by direct addressing mode only.
Address $80 to $FF is SFR area.
The following table lists the SFRs which are identical to general 8052, as well as SM8954A Extension SFRs.
Special Function Register (SFR) Memory Map
$F8
$F0
$E8
$E0
$D8
$D0
$C8
$C0
$B8
$B0
$A8
$A0
$98
$90
$88
$80
B
ACC
P4
PSW
T2CON
IP
P3
IE
P2
SCON
P1
TCON
P0
$FF
$F7
$EF
$E7
$DF
$D7
$CF
$C7
$BF
$B7
$AF
$A7
$9F
$97
$8F
$87
T2MOD
RCAP2L
RCAP2H
TL2
TH2
SCONF
SBUF
TMOD
SP
TL0
DPL
SPWMC
P1CON
TL1
DPH
SPWMD4
SPWMD0
TH0
SPWMD1
TH1
RCON
SPWMD2
SPWMD3
WDTC
WDTKEY
PCON
Note: The text of SFRs with bold type characters are Extension Special Function Registers f o r SM8954A
Addr
85H
97H
9BH
9FH
A3H
A4H
A5H
A6H
A7H
ACH
BFH
C8H
C9H
D8H
SFR
RCON
WDTKEY
P1CON
WDTC
SPWMC
SPWMD0
SPWMD1
SPWMD2
SPWMD3
SPWMD4
SCONF
T2CON
T2MOD
P4
Reset
00H
00H
00000***
0*0**000
******00
00H
00H
00H
00H
00H
0*****00
00H
******00
****1111
P4.3
P4.2
SPWMD04
SPWMD14
SPWMD24
SPWMD34
SPWMD44
WDR
TF2
EXF2
RCLK
TCLK
EXEN2
TR2
SPWMD03
SPWMD13
SPWMD23
SPWMD33
SPWMD43
SPWMD02
SPWMD12
SPWMD22
SPWMD32
SPWMD42
SPWMD01
SPWMD11
SPWMD21
SPWMD31
SPWMD41
SPWMD00
SPWMD10
SPWMD20
SPWMD30
SPWMD40
BRM02
BRM12
BRM22
BRM32
BRM42
WDTKEY7
SPWME4
WDTE
WDTKEY6
SPWME3
WDTKEY5
SPWME2
CLEAR
WDTKEY4
SPWME1
WDTKEY3
SPWME0
PS2
PS1
SPFS1
BRM01
BRM11
BRM21
BRM31
BRM41
OME
C/T2
T2OE
P4.1
PS0
SPFS0
BRM00
BRM10
BRM20
BRM30
BRM40
ALEI
CP/RL2
DCEN
P4.0
WDTKEY2
7
6
5
4
3
2
1
RAMS1
WDTKEY1
0
RAMS0
WDTKEY0
Specifications subject to change without notice contact your sales representatives for the most recent information.
5
Ver 2.1 SM8954A 08/2006
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