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UPD17145 Datasheet(PDF) 27 Page - NEC |
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UPD17145 Datasheet(HTML) 27 Page - NEC |
27 / 102 page 27 µPD17145(A1), 17147(A1), 17149(A1) 9.2 Function of Data Buffer The data buffer has two main functions. One is to transfer data with the peripheral hardware, and the other is to read the constant data on the program memory (table reference). Figure 9-3 shows the relationships between the data buffer and peripheral hardware. Figure 9-3. Data Buffer and Peripheral Hardware 01H 02H 03H 04H 40H 45H Shift register (SIOSFR) Timer 0 modulo register (TM0M) Timer 1 modulo register (TM1M) A/D converter data register (ADCR) Address register (AR) Timer 0 timer 1 count register (TM0TM1C) Data buffer (DBF) Internal bus Program memory (ROM) Constant data Peripheral address Peripheral hardware |
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