UPD65 NEC [NEC], UPD65 Datasheet - Page 4

• Manufacturer Part Number: UPD65
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC [NEC]

1. PIN FUNCTIONS ...............................................................................................................................
2. INTERNAL CPU FUNCTIONS ..........................................................................................................
3. PORT REGISTERS (PX) ................................................................................................................... 14
4. TIMER ............................................................................................................................................... 19
5. STANDBY FUNCTION ...................................................................................................................... 22
6. RESET ............................................................................................................................................... 26
7. POC CIRCUIT ................................................................................................................................... 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 ...............................................................................................................................
INPUT/OUTPUT Circuits of Pins ............................................................................................................
Dealing with 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
3.2.4
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 Setup and Release ......................................................................................................... 23
Standby Mode Release Timing .............................................................................................................. 25
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
S
I
0
1
2
/LED (bit 3 of P1) ...................................................................................................................... 16
port (P
port (bit 2 of P1) ....................................................................................................................... 16
port (bit 1 of P1) ....................................................................................................................... 17
11
: bits 4-7 of P1) ........................................................................................................... 16
Data Sheet U14380EJ2V0DS00
CONTENTS
PD64A, 65
6
9
6
7
8
9
9
9