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W741C260 Datasheet, PDF (23/92 Pages) Winbond – 4-BIT MICROCONTROLLER | |||
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W741C260
RC.0
PM0.2
DATA BUS
Signal
change
detector
PEF.0
RC.1
PM0.2
RC.2
PM0.2
RC.3
PM0.2
Signal
change
detector
PEF.1
Signal
change
detector
PEF.2
Signal
change
detector
PEF.3
DQ
ck
R
PSR0.0
DQ
ck
R
PSR0.1
DQ
ck
R
PSR0.2
DQ
ck
R
PSR0.3
DQ
ck
R
EVF.2
HEF.2
IEF.2
HCF.2
INT 2
CLR EVF, #I
Reset
Falling
edge
detector
Falling
edge
detector
Falling
edge
detector
Falling
edge
detector
SEF.0
SEF.1
SEF.2
SEF.3
Reset
MOV PEF, #I
CLR PSR0
Wake up from STOP mode
Figure 10. Architecture of Input Ports RC
Output Port RE
When the MOV RE, R instruction is executed, the data in the RAM will be output to port RE and it
provides a high sink current to drive LEDs.
Port Status Register 0 (PSR0)
Port status register 0 is organized as 4-bit binary register (PSR0.0 to PSR0.3). PSR0 can be read or
cleared by the MOVA R, PSR0, and CLR PSR0 instructions. The bit descriptions are as follows:
3
2
1
0
PSR0 R
R
R
R
Note: R means read only.
Bit 0 = 1
Bit 1 = 1
Bit 2 = 1
Bit 3 = 1
Signal change on RC.0
Signal change on RC.1
Signal change on RC.2
Signal change on RC.3
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Publication Release Date: March 1998
Revision A3
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