Renesas rl78 User Manual
RL78/G1A
CHAPTER 6 TIMER ARRAY UNIT
R01UH0305EJ0200 Rev.2.00
208
Jul 04, 2013
6.3.6 Timer channel start register m (TSm)
The TSm register is a trigger register that is used to initialize timer count register mn (TCRmn) and start the counting
operation of each channel.
When a bit of this register is set to 1, the corresponding bit of timer channel enable status register m (TEm) is set to 1.
The TSmn, TSHm1, TSHm3 bits are immediately cleared when operation is enabled (TEmn, TEHm1, TEHm3 = 1),
because they are trigger bits.
The TSm register can be set by a 16-bit memory manipulation instruction.
The lower 8 bits of the TSm register can be set with a 1-bit or 8-bit memory manipulation instruction with TSmL.
Reset signal generation clears this register to 0000H.
Figure 6-14. Format of Timer Channel Start register m (TSm)
Address: F01B2H, F01B3H (TS0) After reset: 0000H R/W
Symbol 15
14
13
12
11
10
9 8 7 6 5 4 3 2 1 0
TSm 0
0
0
0
TSHm
3
0
TSHm
1
0
TSm
7
TSm
6
TSm
5
TSm
4
TSm
3
TSm
2
TSm
1
TSm
0
TSH
m3
Trigger to enable operation (start operation) of the higher 8-bit timer when channel 3 is in the 8-bit timer mode
0
No trigger operation
1
The TEHm3 bit is set to 1 and the count operation becomes enabled.
The TCRm3 register count operation start in the interval timer mode in the count operation enabled state
(see Table 6-6 in 6.5.2 Start timing of counter).
TSH
m1
Trigger to enable operation (start operation) of the higher 8-bit timer when channel 1 is in the 8-bit timer mode
0
No trigger operation
1
The TEHm1 bit is set to 1 and the count operation becomes enabled.
The TCRm1 register count operation start in the interval timer mode in the count operation enabled state
(see Table 6-6 in 6.5.2 Start timing of counter).
TSm
n
Operation enable (start) trigger of channel n
0
No trigger operation
1
The TEmn bit is set to 1 and the count operation becomes enabled.
The TCRmn register count operation start in the count operation enabled state varies depending on each
operation mode (see Table 6-6 in 6.5.2 Start timing of counter).
This bit is the trigger to enable operation (start operation) of the lower 8-bit timer for TSm1 and TSm3 when
channel 1 or 3 is in the 8-bit timer mode.
Cautions 1. Be sure to clear bits 15 to 12, 10, 8 to “0”
2. When switching from a function that does not use TImn pin input to one that does, the
following wait period is required from when timer mode register mn (TMRmn) is set until the
TSmn (TSHm1, TSHm3) bit is set to 1.
When the TImn pin noise filter is enabled (TNFENmn = 1): Four cycles of the operation clock (f
MCK
)
When the TImn pin noise filter is disabled (TNFENmn = 0): Two cycles of the operation clock (f
MCK
)
Remarks 1. When the TSm register is read, 0 is always read.
2.
m: Unit number (m = 0), n: Channel number (n = 0 to 7 (however, timer input pin (TImn), timer output
pin (TOmn) : n = 0, 1, 3 to 7))