HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 240

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

10.2.2
The timer synchro register (TSNC) is an eight-bit read/write register that selects timer
synchronizing modes for channels 0–4. Channels for which 1 is set to the corresponding bit will be
synchronized. TSNC is initialized to H'E0 or H'60 upon reset or standby mode.
Note: Undefined
•
•
Bit 4: SYNC4
0
1
•
Bit 3: SYNC3
0
1
•
Bit 2: SYNC2
0
1
226 HITACHI
Bits 7–5 (reserved): Bit 7 is read as undefined. Bits 6 and 5 are always read as 1. The write
value to bit 7 should be 0 or 1, and the write value to bits 6 and 5 should always be 1.
Bit 4 (timer synchro 4 (SYNC4)): SYNC4 selects the synchronizing mode for channel 4.
Bit 3 (timer Synchro 3 (SYNC3)): SYNC3 selects the synchronizing mode for channel 3.
Bit 2 (timer synchro 2 (SYNC2)): SYNC2 selects the synchronizing mode for channel 2.
Initial value:
Bit name:
Timer Synchro Register (TSNC)
R/W:
Bit:
—
—
7
*
Description
The timer counter for channel 4 (TCNT4) operates independently
(Preset/clear of TCNT4 is independent of other channels) (initial value)
Channel 4 operates synchronously. Synchronized preset/clear of
TNCT4 enabled.
Description
The timer counter for channel 3 (TCNT3) operates independently
(Preset/clear of TCNT3 is independent of other channels) (initial value)
Channel 3 operates synchronously. Synchronized preset/clear of
TNCT3 enabled.
Description
The timer counter for channel 2 (TCNT2) operates independently
(Preset/clear of TCNT2 is independent of other channels) (initial value)
Channel 2 operates synchronously. Synchronized preset/clear of
TNCT2 enabled.
—
—
6
1
—
—
5
1
SYNC4 SYNC3
R/W
4
0
R/W
3
0
SYNC2
R/W
2
0
SYNC1 SYNC0
R/W
1
0
R/W
0
0