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Download Epson S1C88650 Computer Hardware User Manual
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5 PERIPHERAL CIRCUITS AND THEIR OPERATION (Programmable Timer) [8-bit mode] [16-bit mode] 8-bit data Low-order 8-bit data Timer 0 input clock Timer 0 Interrupt request TOUT output Timer 0 input clock Timer 0 Timer 1 input clock Timer 1 Interrupt request TOUT output Timer 0 underflow signal Timer 1 8-bit data Interrupt request TOUT output High-order 8-bit data Fig. 5.10.2.1 Counter configuration in 8- and 16-bit mode (example of Timers 0 and 1) Table 5.10.2.1(a) Control registers in 8-bit mode (example of Timers 0 and 1) Address Bit Name 00FF30 D7 MODE16_A D6 PTNREN_A D5 – D4 – D3 PTOUT0 D2 PTRUN0 D1 PSET0 D0 CKSEL0 Function PTM0–1 8/16-bit mode selection External clock 0 noise rejecter selection – R/W register PTM0 clock output control PTM0 Run/Stop control PTM0 preset PTM0 input clock selection 00FF31 D7 D6 D5 D4 D3 D2 D1 D0 – – – R/W register PTM1 clock output control PTM1 Run/Stop control PTM1 preset PTM1 input clock selection – – – – PTOUT1 PTRUN1 PSET1 CKSEL1 1 0 16-bit x 1 8-bit x 2 SR 0 0 Enable Disable – – – 0 1 0 0 On Off 0 Run Stop Preset No operation 0 External clock Internal clock 0 – – – – – – 1 0 On Off Run Stop Preset No operation External clock Internal clock – – – 0 0 0 0 0 R/W R/W R/W Comment "0" when being read R/W Reserved register R/W R/W W "0" when being read R/W Constantly "0" when being read R/W Reserved register R/W R/W W "0" when being read R/W Table 5.10.2.1(b) Control registers in 16-bit mode (example of Timers 0 and 1) Address Bit Name 00FF30 D7 MODE16_A D6 PTNREN_A D5 – D4 – D3 PTOUT0 D2 PTRUN0 D1 PSET0 D0 CKSEL0 Function PTM0–1 8/16-bit mode selection External clock 0 noise rejecter selection – R/W register Invalid (fixed at "0") PTM0 Run/Stop control PTM0 preset PTM0 input clock selection 00FF31 D7 D6 D5 D4 D3 D2 D1 D0 – – – R/W register PTM1 clock output control Invalid (fixed at "0") Invalid (fixed at "0") Invalid (fixed at "0") – – – – PTOUT1 PTRUN1 PSET1 CKSEL1 1 0 16-bit x 1 8-bit x 2 SR 0 0 Enable Disable – – – 0 1 0 0 Invalid Fixed at "0" 0 Run Stop Preset No operation 0 External clock Internal clock 0 – – – – – – – – – 0 1 0 0 On Off 0 Invalid Fixed at "0" 0 Invalid Fixed at "0" 0 Invalid Fixed at "0" R/W R/W R/W Comment "0" when being read R/W Reserved register R/W R/W W "0" when being read R/W Constantly "0" when being read R/W Reserved register R/W R/W W "0" when being read R/W Note: The register names contain a timer number (0–7) to identify the timer to which the register belongs. The following explanation uses "x" instead of the timer number except when it is required. For example, PTRUNx represents PTRUN0 through PTRUN7. Furthermore, a pair of timers are described as Timer(L) and Timer(H) in explanations for 16-bit mode. Timer(L) = Timer 0, Timer 2, Timer 4 or Timer 6 Timer(H) = Timer 1, Timer 3, Timer 5 or Timer 7 This is used for register names. 88 EPSON S1C88650 TECHNICAL MANUAL
