4507_M Datasheet, PDF (124/216 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES

4507 Group
APPLICATION
2.1 I/O pins
(7) Timer control register W6
Bit 0 of register W6 selects the P12/CNTR function, and bit 1 controls the CNTR output.
Set the contents of this register through register A with the TW6A instruction.
The contents of register W6 is transferred to register A with the TAW6 instruction.
Table 2.1.7 shows the timer control register W6.
Table 2.1.7 Timer control register W6
Timer control register W6
at reset : 00002 at RAM back-up : state retained R/W
W63 Not used
0
This bit has no function, but read/write is enabled.
1
W62 Not used
0
This bit has no function, but read/write is enabled.
1
W61 CNTR output control bit
0 Timer 1 underflow signal divided by 2 output
1 Timer 2 underflow signal divided by 2 output
0 P12 (I/O) / CNTR input
W60 P12/CNTR function selection bit
1 P12 (input) / CNTR input/output
Notes 1: “R” represents read enabled, and “W” represents write enabled.
2: When setting the port, W63–W61 are not used.
Rev.2.01 Feb 04, 2005
2-9
REJ09B0195-0201