Datasheet

6
4337K–USB–04/08
AT89C5130A/31A-M
Figure 3-3. AT89C5130A/31A-M 32-pin QFN Pinout
3.2 Signals
All the AT89C5130A/31A-M signals are detailed by functionality on Table 3-1 through Table 3-
12.
Table 3-1. Keypad Interface Signal Description
Table 3-2. Programmable Counter Array Signal Description
1
2
3
4
5
6
QFN32
7
P1.1/T2EX/KIN1/SS
P1.7/CEX4/KIN7/MOSI
P1.3/CEX0/KIN3 P1.5/CEX2/KIN5/MISO P1.6/CEX3/KIN6/SCK
P3.0/RxD
AVSS
XTAL1
VREF
UCAP
P3.2/INT0
P3.5/T1/LED1
XTAL2
RST
P3.1/TxD
P3.3/INT1/LED0
P3.7/RD/LED3
D-
VSS
P4.1/SDA
D+
P4.0/SCL
P1.2/ECI/KIN2
P1.4/CEX1/KIN4
P3.4/T0
P1.0/T2/KIN0
VDD
8
PLLF
P3.6/WR/LED2
UVSS
NC
NC
24
23
22
21
20
19
18
17
9 10 11 12 13 14 15 16
32 31 30 29 28 27 26 25
Note : The metal plate can be connected to Vss
Signal
Name Type Description
Alternate
Function
KIN[7:0) I
Keypad Input Lines
Holding one of these pins high or low for 24 oscillator periods triggers a
keypad interrupt if enabled. Held line is reported in the KBCON register.
P1[7:0]
Signal
Name Type Description
Alternate
Function
ECI I External Clock Input P1.2