W741E260 Datasheet, PDF (17/94 Pages) Winbond – 4-BIT FLASH MICROCONTROLLER

W741E260
Bit 0 = 0 The internal fundamental frequency of Timer 1 is FOSC.
= 1 The internal fundamental frequency of Timer 1 is FOSC/64.
Bit 1 = 0 The fundamental frequency source of Timer 1 is the internal clock.
= 1 The fundamental frequency source of Timer 1 is the external clock from RC.0 input pin.
Bit 2 = 0 The specified waveform of the MFP generator is delivered at the MFP output pin.
= 1 The specified frequency of Timer 1 is delivered at the MFP output pin.
Bit 3 = 0 Timer 1 stops down-counting.
= 1 Timer 1 starts down-counting.
Input/Output Ports RA, RB
Port RA consists of pins RA.0 to RA.3 and Port RB consists of pins RB.0 to RB.3. At initial reset,
input/output ports RA and RB are both in input mode. When RA and RB are used as output ports,
CMOS or NMOS open drain output type can be selected by the PM0 register. Each pin of port RA or
RB can be specified as input or output mode independently by the PM1 and PM2 registers. The MOVA
R, RA or MOVA R, RB instructions operate the input functions and the MOV RA, R or MOV RB, R
operate the output functions. For more details, refer to the instruction table and Figure 8.
DATA
BUS
Input/Output Pin of the RA(RB)
PM0.0 (or PM0.1)
Vdd
Output
Buffer
Enable
MOV RA, R
(or MOV RB, R)
Instruction
PM1.n
(or PM2.n)
Enable
MOVA R, RA
(or MOVA R, RB)
instruction
Figure 8. Architecture of Input/Output Pins
I/O PIN
RA.n(RB.n)
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Publication Release Date: March 1998
Revision A2