Count Clock - Epson S1C17704 Technical Manual

12.3 Count Clock

The 8-bit timer uses a prescaler output clock as the count clock. The prescaler divides the PCLK clock by 1 to 16K
to generate 15 clocks. Select one of the prescaler output clocks using the DF[3:0] bits (D[3:0]/T8F_CLK register).
∗ DF[3:0]: Timer Input Clock Select Bits in the 8-bit Timer Input Clock Select (T8F_CLK) Register (D[3:0]/0x4200)
DF[3:0]
0xf
0xe
0xd
0xc
0xb
0xa
0x9
0x8
Notes: • Before the 8-bit timer can start counting, the prescaler must be run.
• When setting the count clock, make sure the 8-bit timer counter is stopped.
For controlling the prescaler, see Chapter 9, "Prescaler (PSC)."
S1C17704 TECHNICAL MANUAL
Table 12.3.1 Selecting the Count Clock
Prescaler output clock
Reserved
PCLK•1/16384
PCLK•1/8192
PCLK•1/4096
PCLK•1/2048
PCLK•1/1024
PCLK•1/512
PCLK•1/256
EPSON
DF[3:0] Prescaler output clock
0x7 PCLK•1/128
0x6 PCLK•1/64
0x5 PCLK•1/32
0x4 PCLK•1/16
0x3 PCLK•1/8
0x2 PCLK•1/4
0x1 PCLK•1/2
0x0 PCLK•1/1
12 8-BIT TIMER (T8F)
(Default: 0x0)
12-3