HD6413308 Hitachi Semiconductor, HD6413308 Datasheet - Page 333

• Manufacturer Part Number: HD6413308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: Hitachi Semiconductor

TCSR—Timer Control/Status Register
Bit
Initial value
Read/Write R/(W)*
*
*
1
2
Software can write a “0” in bits 7 to 5 to clear the flags, but cannot write a “1” in these bits.
When all four bits (OS3 to OS0) are cleared to “0,” output is disabled.
CMFB CMFA
7
0
1
R/(W)*
Compare-Match Flag B
0 Cleared from when CPU reads CMFB = “1,” then writes “0” in CMFB.
1 Set when TCNT = TCORB.
6
0
Compare-Match Flag A
0 Cleared when CPU reads CMFA = “1,” then writes “0” in CMFA.
1 Set when TCNT = TCORA.
1
Timer Overflow Flag
0 Cleared when CPU reads OVF = “1,” then writes “0” in OVF.
1 Set when TCNT changes from H’FF to H’00.
R/(W)*
OVF
5
0
1
Output Select
0 0 No change on compare-match B.
0 1 Output “0” on compare-match B.
1 0 Output “1” on compare-match B.
1 1 Invert (toggle) output on compare-match B.
—
—
Output Select
0 0 No change on compare-match A.
0 1 Output “0” on compare-match A.
1 0 Output “1” on compare-match A.
1 1 Invert (toggle) output on compare-match A.
4
1
325
OS3*
R/W
3
0
H’FFC9
2
OS2*
R/W
2
0
2
OS1*
R/W
1
0
2
TMR0
OS0*
R/W
0
0
2