D12320VF25V Datasheet, PDF (372/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 9 16-Bit Timer Pulse Unit (TPU)
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.
9.2.9 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: Must 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.
Rev.7.00 Feb. 14, 2007 page 338 of 1108
REJ09B0089-0700