EM78P458/459
OTP ROM
3. PIN ASSIGNMENT
P56/CIN+
P57/CO
P60/ADC1
P61/ADC2
ENTCC
Vss
1
2
24
23
22
21
20
19
18
17
16
15
14
13
P55/CIN-
P54/TCC
OSCI
P56/CIN+
P57/CO
1
2
20
19
18
17
16
15
14
13
12
11
P55/CIN-
P54/TCC
OSCI
3
4
OSCO
P60/ADC1
P61/ADC2
Vss
3
5
RESET
4
OSCO
6
VDD
5
VDD
Vss
P62/ADC3
P63/ADC4
P64/ADC5
P65/ADC6
P66/ADC7
7
VDD
P62/ADC3
P63/ADC4
P64/ADC5
P65/ADC6
P66/ADC7
6
P53/VREF
P52/PWM2
P51/PWM1
P50/INT
P67/ADC8
8
P53/VREF
P52/PWM2
P51/PWM1
P50/INT
P67/ADC8
7
9
8
10
11
12
9
10
Fig. 1 Pin Assignment
Table 1 EM78P458 Pin Description
Symbol Pin No. Type
VDD
Function
16
18
-
I
Power supply.
* XTAL type: Crystal input terminal or external clock input pin.
* RC type: RC oscillator input pin.
OSCI
*XTAL type: Output terminal for crystal oscillator or external clock input
pin.
OSCO
17
12
O
*RC type: Clock output with a period of one instruction cycle time, the
prescaler is determined by the CONT register.
* External clock signal input.
* General-purpose Input only.
P50
I
* Default value while power-on reset.
13~15
19, 20,
1, 2
* General-purpose I/O pin.
P51 ~ P57
I/O
* Default value while power-on reset.
3, 4,
* General-purpose I/O pin.
P60 ~ P67
INT
I/O
6~11
12
* Default value while power-on reset.
* External interrupt pin triggered by falling edge.
* Analog to Digital Converter.
I
I
3, 4,
ADC1~ADC8
6 ~ 11
* Defined by AD-CMPCON (IOCA0)<2:4>.
* Pulse width modulation outputs.
PWM1,
PWM2
13, 14
O
I
* Defined by PWMCON (IOC51)<6, 7>
* External reference voltage for ADC
* Defined by AD-CMPCON (IOCA0)<7>.
VREF
15
This specification is subject to change without prior notice.
6
06.25.2004 (V1.4)
ELAN [ ELAN MICROELECTRONICS CORP ]
