
1997 Apr 16
6
Philips Semiconductors
Product specication
8-bit microcontrollers with DTMF generator,
8 kbytes OTP and 128 bytes EEPROM
PCD3755A; PCD3755E;
PCD3755F
5.2
Pin description
Table 1
SOT117-1 and SOT136-1 packages (for information on parallel I/O ports, see Chapter 14)
Table 2
SOT358-1 package (for information on parallel I/O ports, see Chapter 14)
SYMBOL
PIN
TYPE
DESCRIPTION
P1.1 to P0.7
1 to 7
I/O
7 bits of Port 0: 8-bit quasi-bidirectional I/O port
T1
8
I
Test 1 or count input of 8-bit Timer/event counter 1
XTAL1
9
I
crystal oscillator or external clock input
XTAL2
10
O
crystal oscillator output
RESET
11
I
reset input
CE/T0
12
I
Chip Enable or Test 0
P1.0 to P1.6
13 to 19
I/O
7 bits of Port 1: 8-bit quasi-bidirectional I/O port
P1.7/MDY
20
I/O
1 bit of Port 1: 8-bit quasi-bidirectional I/O port; or melody output
P2.0
21
I/O
1 bit of Port 2: 4-bit quasi-bidirectional I/O port
VSS
22
ground
TONE
23
O
DTMF output
VDD
24
P
positive supply voltage
P2.1 to P2.3
25 to 27
I/O
3 bits of Port 2: 4-bit quasi-bidirectional I/O port
P0.0
28
I/O
1 bit of Port 0: 8-bit quasi-bidirectional I/O port
SYMBOL
PIN
TYPE
DESCRIPTION
n.c.
1, 13, 17, 28
not connected
P0.5 to P0.7
2 to 4
I/O
3 bits of Port 0: 8-bit quasi-bidirectional I/O port
T1
5
I
Test 1 or count input of 8-bit Timer/event counter 1
XTAL1
6
I
crystal oscillator or external clock input
XTAL2
7
O
crystal oscillator output
RESET
8
I
reset input
CE/T0
9
I
Chip Enable or Test 0
P1.0 to P1.6
10 to 12,
14 to 16, 18
I/O
7 bits of Port 1: 8-bit quasi-bidirectional I/O port
P1.7/MDY
19
I/O
1 bit of Port 1: 8-bit quasi-bidirectional I/O port; or melody output
P2.0
20
I/O
1 bit of Port 2: 4-bit quasi-bidirectional I/O port
VSS
21
P
ground
TONE
22
O
DTMF output
VDD
23
P
positive supply voltage
P2.1 to P2.3
24 to 26
I/O
3 bits of Port 2: 4-bit quasi-bidirectional I/O port
P0.0 to P0.4
27, 29 to 32
I/O
5 bits of Port 0: 8-bit quasi-bidirectional I/O port