HD64F2357VF13 Datasheet, PDF (397/1049 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Bits 7 and 6—Reserved: Should always be written with 0.
Bits 5 to 0—Counter Start 5 to 0 (CST5 to CST0): These bits select operation or stoppage for TCNT.
Bit n
CSTn
Description
0
TCNTn count operation is stopped
(Initial value)
1
TCNTn performs count operation
Note:
n = 5 to 0
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.
10.2.9 Timer Synchro Register (TSYR)
Bit
:
7
—
Initial value :
0
R/W
:—
6
5
4
3
2
1
0
— SYNC5 SYNC4 SYNC3 SYNC2 SYNC1 SYNC0
0
0
0
0
0
0
0
—
R/W
R/W
R/W
R/W
R/W
R/W
TSYR is an 8-bit readable/writable register that selects independent operation or synchronous operation for the channel 0
to 4 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*¹, and synchronous clearing through
counter clearing on another channel*² are possible.
Notes: 1. To set synchronous operation, the SYNC bits for at least two channels must be set to 1.
2. To set synchronous clearing, in addition to the SYNC bit, the TCNT clearing source must also be set by means
of bits CCLR2 to CCLR0 in TCR.
Bit n
SYNCn
0
1
Description
TCNTn operates independently (TCNT presetting/clearing is unrelated to
other channels)
(Initial value)
TCNTn performs synchronous operation
TCNT synchronous presetting/synchronous clearing is possible
n = 5 to 0
Rev.6.00 Oct.28.2004 page 367 of 1016
REJ09B0138-0600H