What is S1 of the command continuous input enable time TB1+21/fosc*S1+THWL1 shown in the description of the 2-byte continuous command in the uPD6464A, 6465 Data Sheet?
A1 In relation to the BUSY period of the 2-byte continuous command shown in the data sheet, S1 of command continuous input enable time TB1+21/fosc*S1+THWL1 and S2 of 21/fosc*S2+THWL2 indicate the character size, and they are either 1 (time) or 2 (times). As the recommended operation timing in electrical specifications of the data sheet, the minimum clock cycle (tTCLK) is stated to be 1 us. Since eight clocks are used, the minimum clock period is 8 us. If the calculation result of TB2 or TB2′ is greater than the value of TB1 + (Seven clock cycles (at least 7 us) of CLK input), use the calculation result of TB2 or TB2′ as is. If it is less, however, do not use the calculation result of TB2 or TB2′ but use the value of TB1 + (Seven clock cycles (at least 7 us) of CLK input).
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