UPD62A NEC, UPD62A Datasheet - Page 4

• Manufacturer Part Number: UPD62A
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC

1. PIN FUNCTIONS ..........................................................................................................................
2. INTERNAL CPU FUNCTIONS .....................................................................................................
3. PORT REGISTERS (PX) .............................................................................................................. 14
4. TIMER ........................................................................................................................................... 19
5. STANDBY FUNCTION ................................................................................................................. 22
6. RESET PIN ................................................................................................................................... 26
7. POC CIRCUIT (MASK OPTION) .................................................................................................. 27
8. SYSTEM CLOCK OSCILLATOR ................................................................................................. 29
4
1.1
1.2
1.3
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.1
3.2
3.3
3.4
4.1
4.2
4.3
4.4
5.1
5.2
5.3
7.1
7.2
List of Pin Functions .........................................................................................................................
Pin Input/Output Circuits ..................................................................................................................
Recommended Connection of Unused Pins ...................................................................................
Program Counter (PC) ......................................................................................................................
Stack Pointer (SP) .............................................................................................................................
Address Stack Register (ASR (RF)) .................................................................................................
Program Memory (ROM) ................................................................................................................... 10
Data Memory (RAM) .......................................................................................................................... 10
Data Pointer (DP) ............................................................................................................................... 11
Accumulator (A) ................................................................................................................................ 11
Arithmetic and Logic Unit (ALU) ...................................................................................................... 12
Flags ................................................................................................................................................... 12
2.9.1
2.9.2
K
K
3.2.1
3.2.2
3.2.3
Control Register 0 (P3) ..................................................................................................................... 17
Control Register 1 (P4) ..................................................................................................................... 18
Timer Configuration .......................................................................................................................... 19
Timer Operation ................................................................................................................................. 20
Carrier Output .................................................................................................................................... 21
Software Control of Timer Output ................................................................................................... 21
Outline of Standby Function ............................................................................................................ 22
Standby Mode Setting and Release ................................................................................................. 23
Standby Mode Release Timing ........................................................................................................ 24
Functions of POC Circuit .................................................................................................................. 28
Oscillation Check at Low Supply Voltage ....................................................................................... 28
I/O
I
Port/Special Ports (P1) ................................................................................................................. 16
Port (P0) ....................................................................................................................................... 15
Status flag (F) .......................................................................................................................... 12
Carry flag (CY) ........................................................................................................................ 13
K
S
S
I
0
1
/LED (bit 3 of P1) ................................................................................................................. 16
port (P
port (bit 2 of P1) .................................................................................................................. 16
11
: bits 4 to 7 of P1) .................................................................................................. 16
TABLE OF CONTENTS
Data Sheet U14474EJ1V0DS00
6
9
6
7
8
9
9
9
PD62A