ELANsat Tech EM78P156N 3. PIN ASSIGNMENTS, Table 1 EM78P156NP and EM78P156NM Pin Description

EM78P156N

OTP ROM

3. PIN ASSIGNMENTS

P52 1

P53 2

TCC 3

/RESET 4

Vss 5

P60/INT 6

P61 7

P62 8

P63 9

EM78P156NM EM78P156NP

18	P51	NC	1
		P52	2
17	P50
16	OSCI	P53	3
		TCC	4
15	OSCO
		/RESET	5
14	VDD
		Vss	6
13	P67
		P60/INT	7
12	P66	P61	8
11
	P65	P62	9
10	P64	P63	10

EM78P156NAS

20	NC	P52	1
19	P51
			2
		P53
18	P50
		TCC	3
17	OSCI	/RESET	4
	OSCO
16		Vss	5
15	VDD	Vss	6
14	P67	P60/INT	7
13	P66	P61	8
12	P65	P62	9
11	P64	P63	10

EM78P156NKM

20 P51

19 P50

18 OSCI

17 OSCO

16 VDD

15 VDD

14 P67

13 P66

12 P65

11 P64

				Fig. 1 Pin Assignment
Table 1 EM78P156NP and EM78P156NM Pin Description
	Symbol	Pin No.	Type	Function
	VDD	14	-	* Power supply.
	OSCI	16	I	* XTAL type: Crystal input terminal or external clock input pin.
				* ERC type: RC oscillator input pin.
				* XTAL type: Output terminal for crystal oscillator or external clock input pin.
	OSCO	15	I/O	* RC type: Instruction clock output.
				* External clock signal input.
	TCC	3	I	* The real time clock/counter (with Schmitt trigger input pin), must be tied to
				VDD or VSS if not in use.
	/RESET	4	I	* Input pin with Schmitt trigger. If this pin remains at logic low, the controller
				will also remain in reset condition.
	P50~P53	17,18,	I/O	* P50~P53 are bi-directional I/O pins.
				* P50 and P51 can also be defined as the R-option pins.
		1, 2		* P50~P52 can be pulled-down by software.
	P60~P67	6~13	I/O	* P60~P67 are bi-directional I/O pins.
				* These can be pulled-high or can be open-drain by software programming.
				* P60~P63 can also be pulled-down by software.
	/INT	6	I	* External interrupt pin triggered by falling edge.
	VSS	5	-	* Ground.

This specification is subject to change without prior notice. 6 07.29.2004 (V1.2)