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EM78156E Schematic ( PDF Datasheet ) - ELAN Microelectronics

Teilenummer EM78156E
Beschreibung 8-Bit Microcontroller
Hersteller ELAN Microelectronics
Logo ELAN Microelectronics Logo 




Gesamt 30 Seiten
EM78156E Datasheet, Funktion
EM78156E
8-Bit Microcontroller
with MASK ROM
Product
Specification
DOC. VERSION 1.4
ELAN MICROELECTRONICS CORP.
April 2016






EM78156E Datasheet, Funktion
EM78156E
8-Bit Microcontroller with MASK ROM
Package types:
18 pin DIP 300mil : EM78156EP
18 pin SOP(SOIC) 300mil : EM78156EM
20 pin SSOP 209mil : EM78156EAS
20 pin SSOP 209mil : EM78156EKM
99.9% single instruction cycle commands
The transient point of system frequency between HXT and LXT is around 400kHz
3 Pin Assignment
P52
P53
TCC
/RESET
Vss
P60/INT
P61
P62
P63
1
2
3
4
5
6
7
8
9
18 P51
NC 1
P52 2
17 P50
P53 3
16 OSCI
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
20 NC
19 P51
18 P50
P52
P53
TCC
1
2
3
17 OSCI /RESET 4
16 OSCO
Vss 5
15 VDD
Vss 6
14 P67 P60/INT 7
13 P66
P61 8
12 P65
P62 9
11 P64
P63 10
Figure 1 Pin Assignment
20 P51
19 P50
18 OSCI
17 OSCO
16 VDD
15 VDD
14 P67
13 P66
12 P65
11 P64
Table 1 EM78156EP and EM78156EM Pin Description
Symbol Pin No.
VDD
14
OSCI
16
Type
-
I
OSCO 15
I/O
TCC
3
/RESET 4
P50~P53
17, 18,
1, 2
I
I
I/O
P60~P67 6~13
/INT
VSS
6
5
I/O
I
-
Function
Power supply.
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.
RC type: Instruction clock output.
External clock signal input.
The real time clock/counter (with Schmitt trigger input pin), must be tied to
VDD or VSS if not in use.
Input pin with Schmitt trigger. If this pin remains at logic low, the controller
will also remain in reset condition.
P50~P53 are bi-directional I/O pins.
P50 and P51 can also be defined as the R-option pins.
P50~P52 can be pulled-down by software.
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.
External interrupt pin triggered by falling edge.
Ground
2 Product Specification (V1.4) 04.27.2016
(This specification is subject to change without prior notice)

6 Page









EM78156E pdf, datenblatt
EM78156E
8-Bit Microcontroller with MASK ROM
4.2 Special Purpose Registers
4.2.1 A (Accumulator)
Internal data transfer, or instruction operand holding
It cannot be addressed.
4.2.2 CONT (Control Register)
76543210
-
/INT TS
TE
PAB
PSR2
PSR1
PSR0
Bit 0 (PSR0) ~ Bit 2 (PSR2) TCC/WDT prescaler bits.
PSR2 PSR1 PSR0
TCC Rate
000
001
010
011
100
101
110
111
1:2
1:4
1:8
1:16
1:32
1:64
1:128
1:256
WDT Rate
1:1
1:2
1:4
1:8
1:16
1:32
1:64
1:128
Bit 3 (PAB) Prescaler Assigned Bit
0: TCC
1: WDT
Bit 4 (TE) TCC signal edge
0: increment if the transition from low to high takes place on TCC pin
1: increment if the transition from high to low takes place on TCC pin
Bit 5 (TS) TCC signal source
0: internal instruction cycle clock
1: transition on TCC pin
Bit 6 (/INT) Interrupt enable flag
0: masked by DISI or hardware interrupt
1: enabled by ENI/RETI instructions
Bit 7
Not used.
CONT register is both readable and writable.
4.2.3 IOC5 ~ IOC6 (I/O Port Control Register)
"1" put the relative I/O pin into high impedance, while "0" defines the relative I/O pin as
output.
8 Product Specification (V1.4) 04.27.2016
(This specification is subject to change without prior notice)

12 Page





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