/*
地址/命令直接
7 6 5 4 3 2 1 0
1 RAM/CK A4 A3 A2 A1 A0 RD/WR
RAM/CK 1:RAM 0:RTC
RD/WR 1:Read 0:Write
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讀取寄存器
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RTC 時鐘寄存器
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(1/2)前字節 | 後字節
READ WRITE | BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 RANGE
81h 80h | CH 10 Seconds Seconds 00–59
83h 82h | 10 Minutes Minutes 00–59
85h 84h | 12/24 0 10/(AM/PM) Hour Hour 1–12/0–23
87h 86h | 0 0 10 Date Date 1–31
89h 88h | 0 0 0 10 Month Month 1–12
8Bh 8Ah | 0 0 0 0 0 Day 1–7
8Dh 8Ch | 10 Year Year 00–99
8Fh 8Eh | WP 0 0 0 0 0 0 0 —
91h 90h | TCS TCS TCS TCS DS DS RS RS —
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==============================================================================================
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RAM 儲存
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C1h C0h 00-FFh
C3h C2h 00-FFh
C5h C4h 00-FFh
. . .
. . .
. . .
FDh FCh 00-FFh
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*/
