Epson S1C17001 Technical Manual

Contents

12 8-BIT TIMER (T8F)S1C17001 TECHNICAL MANUAL EPSON 12712.3 Count ClockThe 8-bit timer uses the prescaler output clock as the count clock. The prescaler generates 15 different clocks by di-viding the PCLK clock into 1/1 to 1/16 K divisions. One of these is selected by the DF[3:0] bit (D[3:0]/T8F_CLKregister).∗ DF[3:0]: Timer Input Clock Select Bits in the 8-bit Timer Input Clock Select (T8F_CLK) Register (D[3:0]/0x4200)Table 12.3.1: Count clock selectionDF[3:0] Prescaler output clock DF[3:0] Prescaler output clock0xf Reserved 0x7 PCLK-1/1280xe PCLK-1/16384 0x6 PCLK-1/640xd PCLK-1/8192 0x5 PCLK-1/320xc PCLK-1/4096 0x4 PCLK-1/160xb PCLK-1/2048 0x3 PCLK-1/80xa PCLK-1/1024 0x2 PCLK-1/40x9 PCLK-1/512 0x1 PCLK-1/20x8 PCLK-1/256 0x0 PCLK-1/1(Default: 0x0)Note: • The prescaler must run before the 8-bit timer.• Make sure the 8-bit timer count is halted before changing count clock settings.For detailed information on the prescaler control, see “9 Prescaler (PSC).”