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Teilenummer | EM78156E |
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Beschreibung | 8-Bit Microcontroller | |
Hersteller | ELAN Microelectronics | |
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Gesamt 30 Seiten EM78156E
8-Bit Microcontroller
with MASK ROM
Product
Specification
DOC. VERSION 1.4
ELAN MICROELECTRONICS CORP.
April 2016
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
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 | ||
Seiten | Gesamt 30 Seiten | |
PDF Download | [ EM78156E Schematic.PDF ] |
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