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GMS81C2112 Datasheet(PDF) 50 Page - Hynix Semiconductor |
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GMS81C2112 Datasheet(HTML) 50 Page - Hynix Semiconductor |
50 / 107 page ![]() GMS81C2112/GMS81C2120 44 JUNE. 2001 Ver 1.00 12.1 8-bit Timer / Counter Mode The GMS81C21xx has two 8-bit Timer/Counters, Timer 0, Timer 1 as shown in Figure 12-2. The "timer" or "counter" function is selected by mode reg- isters TMx as shown in Figure 12-1 and Table 12-1. To use as an 8-bit timer/counter mode, bit CAP0 of TM0 is cleared to "0" and bits 16BIT of TM1 should be cleared to “0”(Table 12-1). Figure 12-2 8-bit Timer/Counter 0, 1 EC0 PIN ÷2 ÷4 ÷8 XIN PIN MUX clear 0: Stop 1: Clear and start T0ST T0CK[2:0] 111 000 001 010 T0CN MUX T1IF clear 0: Stop 1: Clear and start T1ST T1CK[1:0] 11 00 01 TIMER 1 INTERRUPT ÷1 ÷2 ÷8 TDR0 (8-bit) TDR1 (8-bit) T1 (8-bit) T0 (8-bit) Comparator Comparator TIMER 0 TIMER 1 T1O PIN F/F BTCL 7 654 321 0 - -T0CN INITIAL VALUE: --000000B ADDRESS: 0D0H TM0 T0ST T0CK0 T0CK1 CAP0 T0CK2 -- X X X X X means don’t care ÷ ÷ ÷512 ÷2048 011 100 101 110 T0IF TIMER 0 INTERRUPT T0O PIN F/F T1CN 10 INITIAL VALUE: 00H ADDRESS: 0D2H TM1 X means don’t care 0X BTCL 7 654 321 0 16BIT POL T1CN T1ST T1CK0 T1CK1 PWM1E CAP1 X0 X X X X 00 EDGE DETECTOR |