W741C260 Datasheet, PDF (21/92 Pages) Winbond – 4-BIT MICROCONTROLLER

W741C260
Bit 1 = 0 RB.1 works as output pin; Bit 1 = 1 RB.1 works as input pin
Bit 2 = 0 RB.2 works as output pin; Bit 2 = 1 RB.2 works as input pin
Bit 3 = 0 RB.3 works as output pin; Bit 3 = 1 RB.3 works as input pin
At initial reset, the port RB is input mode (PM2 = 1111B).
Reset Function
The W741C260 is reset either by a power-on reset or by using the external RES pin. The initial state
of the W741C260 after the reset function is executed is described below.
Program Counter (PC)
TM0, TM1
MR0, MR1, PM0, PAGE, PMF registers
PM1, PM2 registers
PSR0 register
IEF, HEF, PEF, SEF, HCF, EVF flags
Timer 0 input clock
Timer 1 input clock
MFP output
Input/output ports RA, RB
Output port RE
RA & RB ports output type
RC & RD ports pull-high resistors
Input clock of the watchdog timer
LCD display
Segment output mode
000H
Reset
Reset
Set (1111B)
Reset
Reset
FOSC/4
FOSC
Low
Input mode
High
CMOS type
Disable
FOSC/1024
OFF
LCD drive output
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Publication Release Date: March 1998
Revision A3