Holtek HT66F002, Руководство пользователя

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Rev. 1.71 32 April 11, 2017 Rev. 1.71 33 April 11, 2017
HT66F002/HT66F0025/HT66F003/HT66F004
Cost-Effective A/D Flash MCU with EEPROM
HT66F002/HT66F0025/HT66F003/HT66F004
Cost-Effective A/D Flash MCU with EEPROM
EEPROM Registers
Three registers control the overall operation of the internal EEPROM Data Memory. These are the
address registers, EEA, the data register, EED and a single control register, EEC. As both the EEA
and EED registers are located in Bank 0, they can be directly accessed in the same way as any other
Special Function Register. The EEC register however, being located in Bank1, cannot be directly
addressed directly and can only be read from or written to indirectly using the MP1 Memory Pointer
and Indirect Addressing Register, IAR1. Because the EEC control register is located at address 40H
in Bank 1, the MP1 Memory Pointer must first be set to the value 40H and the Bank Pointer register,
BP, set to the value, 01H, before any operations on the EEC register are executed.
EEPROM Control Registers List
Name
Bit
7 6 5 4 3 2 1 0
EEA — — — D4 D3 D2 D1 D0
EED D7 D6 D5 D4 D3 D2 D1 D0
EEC — — — — WREN WR RDEN RD
EEA Register
Bit 7 6 5 4 3 2 1 0
Name — — — D4 D3 D2 D1 D0
R/W — — — R/W R/W R/W R/W R/W
POR — — — 0 0 0 0 0
B it 7 ~ 5 Unimplemented, read as “0”
B it 4 ~ 0 Data EEPROM address
Data EEPROM address bit 4 ~ bit 0
EED Register
Bit 7 6 5 4 3 2 1 0
Name D7 D6 D5 D4 D3 D2 D1 D0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
POR 0 0 0 0 0 0 0 0
B it 7 ~ 0 Data EEPROM data
Data EEPROM data bit 7 ~ bit 0