ELAN Home Systems EM78P458 - Manual (Page 6)

EM78P458/459
OTP ROM
3. PIN ASSIGNMENT
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
10
11
12 13
14
15
16
17
18
19
20
21
22
23
24
EM78P459
EM78P458
VSS
P60/ADC1
P61/ADC2
P62/ADC3
P63/ADC4
P64/ADC5
P65/ADC6
P66/ADC7
P56/CIN+
P57/CO
VDD
OSCI
OSCO
P53/VREF
P52/PWM2
P51/PWM1
P50/INT
P67/ADC8
P54/TCC
P55/CIN-
P60/ADC1
P61/ADC2
P62/ADC3
P63/ADC4
P64/ADC5
P65/ADC6
P66/ADC7
P56/CIN+
P57/CO
VSS
ENTCC
VSS
OSCI
OSCO
P53/VREF
P52/PWM2
P51/PWM1
P50/INT
P67/ADC8
P54/TCC
P55/CIN-
VDD
RESET
VDD
Fig. 1 Pin Assignment
Table 1 EM78P458 Pin Description
Symbol Pin No. Type Function
VDD 16 - Power supply.
OSCI 18 I
* XTAL type: Crystal input terminal or external clock input pin.
* RC type: RC oscillator input pin.
OSCO 17 O
*XTAL type: Output terminal for crystal oscillator or external clock input
pin.
*RC type: Clock output with a period of one instruction cycle time, the
prescaler is determined by the CONT register.
* External clock signal input.
P50 12 I
* General-purpose Input only.
* Default value while power-on reset.
P51 ~ P57
13~15
19, 20,
1, 2
I/O
* General-purpose I/O pin.
* Default value while power-on reset.
P60 ~ P67
3, 4,
6~11
I/O
* General-purpose I/O pin.
* Default value while power-on reset.
INT 12 I * External interrupt pin triggered by falling edge.
ADC1~ADC8
3, 4,
6 ~ 11
I
* Analog to Digital Converter.
* Defined by AD-CMPCON (IOCA0)<2:4>.
PWM1, 13, 14 O * Pulse width modulation outputs.
This specification is subject to change without prior notice. 07.01.2003 (V1.3) 6