PD64A_15 Datasheet, PDF (6/66 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS FOR INFRARED REMOTE CONTROL TRANSMISSION

µPD64A, 65
CONTENTS
1. PIN FUNCTIONS ............................................................................................................................... 6
1.1 List of Pin Functions ............................................................................................................................... 6
1.2 Pin I/O Circuits......................................................................................................................................... 7
1.3 Recommended Connection of Unused Pins ......................................................................................... 8
2. INTERNAL CPU FUNCTIONS .......................................................................................................... 9
2.1 Program Counter (PC) ............................................................................................................................ 9
2.2 Stack Pointer (SP) ................................................................................................................................... 9
2.3 Address Stack Register (ASR (RF)) ....................................................................................................... 9
2.4 Program Memory (ROM) ......................................................................................................................... 10
2.5 Data Memory (RAM) ................................................................................................................................ 10
2.6 Data Pointer (DP) ..................................................................................................................................... 11
2.7 Accumulator (A) ...................................................................................................................................... 11
2.8 Arithmetic and Logic Unit (ALU) ............................................................................................................ 12
2.9 Flags ......................................................................................................................................................... 12
2.9.1 Status flag (F) ............................................................................................................................... 12
2.9.2 Carry flag (CY) ............................................................................................................................. 13
3. PORT REGISTERS (PX) ................................................................................................................... 14
3.1 KI/O Port (P0) ............................................................................................................................................. 15
3.2 KI Port/Special Port (P1) ......................................................................................................................... 16
3.2.1 KI port (P11: bits 4 to 7 of P1) ....................................................................................................... 16
3.2.2 S0 port (bit 2 of P1) ....................................................................................................................... 16
3.2.3 S1/LED port (bit 3 of P1) ............................................................................................................... 16
3.2.4 S2 port (bit 1 of P1) ....................................................................................................................... 17
3.3 Control Register 0 (P3) ........................................................................................................................... 17
3.4 Control Register 1 (P4) ........................................................................................................................... 18
4. TIMER ............................................................................................................................................... 19
4.1 Timer Configuration ................................................................................................................................ 19
4.2 Timer Operation ....................................................................................................................................... 20
4.3 Carrier Output .......................................................................................................................................... 21
4.4 Software Control of Timer Output ......................................................................................................... 21
5. STANDBY FUNCTION ...................................................................................................................... 22
5.1 Outline of Standby Function .................................................................................................................. 22
5.2 Standby Mode Setting and Release ...................................................................................................... 23
5.3 Standby Mode Release Timing .............................................................................................................. 25
6. RESET ............................................................................................................................................... 26
7. POC CIRCUIT ................................................................................................................................... 27
7.1 Functions of POC Circuit ........................................................................................................................ 28
7.2 Oscillation Check at Low Supply Voltage ............................................................................................. 28
8. SYSTEM CLOCK OSCILLATOR ...................................................................................................... 29
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Data Sheet U14380EJ3V0DS00