SyncMOS Technologies International, Inc.
SM5964A
8-Bit Micro-controller
With 64KB ISP Flash & TWSI & PWM & 1KB RAM embedded
PX0: external interrupt 0 priority.
IP1($B9H)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
PTWSI
PTWSI: When set to ‘1’, enable the TWSI interrupt priority.
The Priority structure and vector locations of interrupts:
Source
Flag
IE0
TF0
IE1
Priority level
1(highest)
Vector Address
03H
External interrupt 0
Timer 0 overflow
External interrupt 1
Timer 1 overflow
UART interrupt
Timer 2 overflow
TWSI
2
3
4
5
6
7
0BH
13H
1BH
23H
2BH
3BH
TF1
RI+TI
TF2+EXF2
RXIF+ TXIF+ TFIF+ NAKIF
T2MOD ($C9H)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
T2OE
DCEN
T2OE: Timer2 clock Output Enable bit. If set to 1, the Timer2 clock will output to P1.0.
DCEN: Down Count Enable. When set this bit then allows Timer2 to be configured as an up/down counter.
Application Reference
Valid for SM5964A
XI
X'tal
C1
C2
R
3MHz
30 pF
30 pF
open
6MHz
30 pF
30 pF
open
9MHz
30 pF
30 pF
open
12MHz
22 pF
22 pF
open
X'tal
SM5964A
R
X2
X'tal
C1
C2
16MHz
30 pF
30 pF
open
25MHz
15 pF
15 pF
open
C1
C2
R
Note:
Oscillation circuit may differs with different crystal or ceramic resonator in higher oscillation frequency which was due to each crystal or ceramic
resonator has its own characteristics. User should check with the crystal or ceramic resonator manufacturer for appropriate value of external
components.
Specifications subject to change without notice contact your sales representatives for the most recent information.
Ver 2.3 SM5964A 10/2006
26
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
