HD6432646 Hitachi, HD6432646 Datasheet - Page 1027

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

TSR4—Timer Status Register 4
Note: * Can only be written with 0 for flag clearing.
Bit
Initial value
Read/Write
Count Direction Flag
0
1
TCNT counts down
TCNT counts up
Underflow Flag
TCFD
0
1
R
7
1
[Clearing condition]
When 0 is written to TCFU after reading TCFU = 1
[Setting condition]
When the TCNT value underflows (changes from H'0000 to H'FFFF)
Overflow Flag
0
1
[Clearing condition]
When 0 is written to TCFV after reading TCFV = 1
[Setting condition]
When the TCNT value overflows (changes from H'FFFF to H'0000)
—
—
6
1
Input Capture/Output Compare Flag B
0
1
[Clearing conditions]
• When DTC is activated by TGIB interrupt while DISEL bit of MRB in DTC is 0
• When 0 is written to TGFB after reading TGFB = 1
[Setting conditions]
• When TCNT = TGRB while TGRB is functioning as output compare register
• When TCNT value is transferred to TGRB by input capture signal while
R/(W)*
TGRB is functioning as input capture register
TCFU
5
0
Input Capture/Output Compare Flag A
0
1
R/(W)*
TCFV
[Clearing conditions]
• When DTC is activated by TGIA interrupt while DISEL bit
• When 0 is written to TGFA after reading TGFA = 1
[Setting conditions]
• When TCNT = TGRA while TGRA is functioning as output
• When TCNT value is transferred to TGRA by input capture
4
0
of MRB in DTC is 0
compare register
signal while TGRA is functioning as input capture register
H'FE95
—
—
3
0
—
—
2
0
R/(W)*
TGFB
1
0
R/(W)*
TGFA
0
0
TPU4
993