PCA84C922 Datasheet, PDF (8/36 Pages) NXP Semiconductors – Microcontrollers for universal infrared remote transmitter applications

Philips Semiconductors
Microcontrollers for universal infrared
remote transmitter applications
Product specification
PCA84C922; PCA84C923
5.2 Pin description
Table 2 PCA84C923D (VS056)
SYMBOL
PIN
DESCRIPTION
P00 to P07
7, 6, 52, 51, 22,
24, 34 and 35
Standard I/O Port lines, generally used for keypad scanning or for LSB address
lines of coding table.
P10
44
Port line 10 or emulation DXWR signal input.
P11
41
Port line 11 or emulation DXRD signal input.
P12
39
Port line 12 or emulation DXALE signal input.
P13
38
Port line 13 or emulation EXDI signal input.
P14 to P17
4, 55, 26 and 32 Standard I/O port lines, generally used for keypad sensing, the wake-up function
can be removed by mask option.
P20 to P23 27, 29, 3 and 56 Standard I/O port lines with 10 mA sink capability.
DP50 to DP57 25, 23, 17, 15, 14, Standard I/O port lines, generally used for the data bus of Coding Table.
12, 9 and 5
DP60 to DP67 28, 31, 33, 40, 42, Standard I/O Port lines, generally used for keypad scanning or for MSB address
43, 45 and 54
lines of Coding Table.
RSTO
1
Used for emulation purposes only. This output is the result of the OR operation
carried out internally on the RESET input and the Watchdog Timer reset and is
connected to the RESET pin of the 84C00.
T0/INT
10
Test pin T0 or external interrupt input.
T1
11
Test pin T1 or timer/counter input (T1).
RESET
13
Active HIGH reset pin; normally connected to V_SS as Power-on-reset serves the
same function.
XTAL2
18
Crystal or ceramic resonator or LC oscillator connections.
XTAL1
19
INTO
30
Used for emulation purposes only and is connected to the T0/INT pin of the
84C00.
LOUT
47
Pulse train output pin, capable of sinking 30 mA.
EMU
V_DD
V_SS
53
16
2 and 46
Emulation mode control pin; for normal operation this pin is connected to V_SS.
Power supply.
Ground.
1997 Oct 22
8