HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 679

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

Bits 2 to 0—Counter Start 2 to 0 (CST2 to CST0): These bits select operation or stoppage for
TCNT.
Bit n: CSTn
0
1
Note: n = 2 to 0
16.2.9
TSYR is an 8-bit readable/writable register that selects independent operation or synchronous
operation for the channel 0 to 2 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.
Bits 7 to 3—Reserved: Should always be written with 0.
Bits 2 to 0—Timer Synchro 2 to 0 (SYNC2 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: n = 2 to 0
Initial value:
If 0 is written to the CST bit during operation with the TIOC pin designated for output, the
counter stops, but the TIOC pin output compare output level is retained. If TIOR is written to
when the CST bit is cleared to 0, the pin output level will be changed to the set initial output
value.
1. To set synchronous operation, the SYNC bits for two channels at least must be set to 1.
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.
R/W:
Bit:
Description
TCNTn count operation is stopped
TCNTn performs count operation
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
R
—
6
0
R
—
5
0
R
—
4
0
R
—
3
0
R
2
are possible.
SYNC2
R/W
2
0
SYNC1 SYNC0
R/W
1
0
(Initial value)
(Initial value)
1
, and
R/W
0
0
667