HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 336

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

9.2.9
TSYR is an 8-bit readable/writable register that selects independent operation or synchronous
operation for the channel 0 to 5 TCNT counters. A channel performs synchronous operation when
the corresponding bit in TSYR is set to 1.
TSYR is initialized to H'00 by a reset, and in hardware standby mode.
Bits 7 and 6—Reserved: Should always be written with 0.
Bits 5 to 0—Timer Synchro 5 to 0 (SYNC5 to SYNC0): These bits select whether operation is
independent of or synchronized with other channels.
When synchronous operation is selected, synchronous presetting of multiple channels*
synchronous clearing through counter clearing on another channel*
Bit n
SYNCn
0
1
Notes: 1. To set synchronous operation, the SYNC bits for at least two channels must be set to 1.
Bit
Initial value
R/W
2. To set synchronous clearing, in addition to the SYNC bit , the TCNT clearing source
Timer Synchro Register (TSYR)
must also be set by means of bits CCLR2 to CCLR0 in TCR.
Description
TCNTn operates independently (TCNT presetting/clearing is unrelated to
other channels)
TCNTn performs synchronous operation
TCNT synchronous presetting/synchronous clearing is possible
:
:
:
—
—
7
0
—
—
6
0
SYNC5
R/W
5
0
SYNC4
R/W
4
0
SYNC3
R/W
3
0
2
SYNC2
are possible.
R/W
2
0
SYNC1
R/W
1
0
(Initial value)
1
, and
SYNC0
n = 5 to 0
R/W
0
0
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