15 16-BIT PWM TIMERS (T16B)
15-28
Seiko Epson Corporation
S1C17M20/M21/M22/M23/M24/M25
TECHNICAL MANUAL (Rev. 1.0)
T16B Ch.
n
Comparator/Capture
m
Control Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
T16BnCCCTLm
15 SCS
0
H0
R/W –
14–12 CBUFMD[2:0]
0x0
H0
R/W
11–10 CAPIS[1:0]
0x0
H0
R/W
9–8 CAPTRG[1:0]
0x0
H0
R/W
7
–
0
–
R
6
TOUTMT
0
H0
R/W
5
TOUTO
0
H0
R/W
4–2 TOUTMD[2:0]
0x0
H0
R/W
1
TOUTINV
0
H0
R/W
0
CCMD
0
H0
R/W
Bit 15
SCS
This bit selects either synchronous capture mode or asynchronous capture mode.
1 (R/W): Synchronous capture mode
0 (R/W): Asynchronous capture mode
For more information, refer to “Comparator/Capture Block Operations - Synchronous capture mode/
asynchronous capture mode.” The T16B
n
CCCTL
m
.SCS bit is control bit for capture mode and is inef-
fective in comparator mode.
Bits 14–12 CBUFMD[2:0]
These bits select the timing to load the comparison value written in the T16B
n
CCR
m
register to the
compare buffer. The T16B
n
CCCTL
m
.CBUFMD[2:0] bits are control bits for comparator mode and
are ineffective in capture mode.
Table 15.6.3 Timings to Load Comparison Value to Compare Buffer
T16BnCCCTLm.
CBUFMD[2:0] bits
Count mode
Comparison Value load timing
0x7–0x5
Reserved
0x4
Up mode
When the counter becomes equal to the comparison value set previously
Also the counter is reset to 0x0000 simultaneously.
Down mode
When the counter becomes equal to the comparison value set previously
Also the counter is reset to the MAX value simultaneously.
Up/down mode When the counter becomes equal to the comparison value set previously
Also the counter is reset to 0x0000 simultaneously.
0x3
Up mode
When the counter reverts to 0x0000
Down mode
When the counter reverts to the MAX value
Up/down mode When the counter becomes equal to the comparison value set previously or
when the counter reverts to 0x0000
0x2
Up mode
When the counter becomes equal to the comparison value set previously
Down mode
Up/down mode
0x1
Up mode
When the counter reaches the MAX value
Down mode
When the counter reaches 0x0000
Up/down mode When the counter reaches 0x0000 or the MAX value
0x0
Up mode
At the CLK_T16Bn rising edge after writing to the T16BnCCRm register
Down mode
Up/down mode
Bits 11–10 CAPIS[1:0]
These bits select the trigger signal for capturing (see Table 15.6.4). The T16B
n
CCCTL
m
.CAPIS[1:0]
bits are control bits for capture mode and are ineffective in comparator mode.
Bits 9–8
CAPTRG[1:0]
These bits select the trigger edge(s) of the trigger signal at which the counter value is captured in the
T16B
n
CCR
m
register in capture mode (see Table 15.6.4). The T16B
n
CCCTL
m
.CAPTRG[1:0] bits
are control bits for capture mode and are ineffective in comparator mode.