HD6433935 Hitachi, HD6433935 Datasheet - Page 213

• Manufacturer Part Number: HD6433935
• Description: 8-Bit MICROCONTROLLER
• Manufacturer: Hitachi

3. Timer control register F (TCRF)
TCRF is an 8-bit write-only register that switches between 16-bit mode and 8-bit mode, selects the
input clock from among four internal clock sources or external event input, and sets the output
level of the TMOFH and TMOFL pins.
TCRF is initialized to H'00 upon reset.
Bit 7: Toggle output level H (TOLH)
Bit 7 sets the TMOFH pin output level. The output level is effective immediately after this bit is
written.
Bit 7
TOLH
0
1
Bits 6 to 4: Clock select H (CKSH2 to CKSH0)
Bits 6 to 4 select the clock input to TCFH from among four internal clock sources or TCFL
overflow.
Bit 6
CKSH2
0
0
0
0
1
1
1
1
Bit:
Initial value:
Read/Write:
Bit 5
CKSH1
0
0
1
1
0
0
1
1
Description
Low level
High level
TOLH
W
7
0
Bit 4
CKSH0
0
1
0
1
0
1
0
1
CKSH2
W
6
0
Description
16-bit mode, counting on TCFL overflow signal
Not available
Internal clock: counting on ø/32
Internal clock: counting on ø/16
Internal clock: counting on ø/4
Internal clock: counting on øw/4
CKSH1
W
5
0
CKSH0
W
4
0
TOLL
W
3
0
CKSL2
W
2
0
CKSL1
W
1
0
(initial value)
(initial value)
*: Don't care
CKSL0
W
0
0
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