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EM78P451SWM 데이터시트(PDF) 8 Page - ELAN Microelectronics Corp

부품명 EM78P451SWM
상세설명  8-Bit Microcontroller with OTP ROM
PDF  54 Pages
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제조업체  EMC [ELAN Microelectronics Corp]
홈페이지  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78P451SWM 데이터시트(HTML) 8 Page - ELAN Microelectronics Corp

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EM78P451S
8-Bit Microcontroller with OTP ROM
4
•
Product Specification (V1.0) 06.01.2004
(This specification is subject to change without further notice)
4
FUNCTION DESCRIPTION
IOC5
R5
P
5
0
P
5
1
P
5
2
P
5
3
P
5
4
P
5
5
P
5
6
P
5
7
IOC6
R6
P
6
0
P
6
1
P
6
2
P
6
3
P
6
4
P
6
5
P
6
6
P
6
7
IOC7
R7
P
7
0
P
7
1
P
7
2
IOC8
R8
P
8
0
P
8
1
P
8
2
P
8
3
P
8
4
P
8
5
P
8
6
P
8
7
IOC9
R9
P
9
0
P
5
5
/
/
S
S
SPI
ENGIN
TMR1
ACC
R3
STACK 1
STACK 2
STACK 3
STACK 4
STACK 5
P C
ROM
Instruction
Register
Instruction
Decoder
ALU
Interrupt
Control
/INT
R4
RAM
WDT Timer
Prescaler
Oscillator/
Timming
Control
WDT
Time-out
R1(TCC)
Sleep
&
Wake Up
Control
DATA & CONTROL BUS
P
9
4
/
S
C
K
P
9
3
/
S
D
O
P
9
2
/
S
D
I
P
9
1
Fig. 2 Functional Block Diagram
4.1 Operational Registers
4.1.1 R0 (Indirect Address Register)
R0 is not a physically implemented register. It is used as an indirect addressing
pointer. Any instruction using R0 as register actually accesses data pointed by the
RAM Select Register (R4).
4.1.2 R1 (TCC)
Increased by the instruction cycle clock.
Written and read by program as any other register.
4.1.3 R2 (Program Counter) & Stack
R2 and the hardware stacks are 12 bits wide.
The structure is depicted in Fig. 3.
Generates 4K
× 13 on-chip ROM addresses to the relative programming instruction
codes. One program page is 1024 words long.
All the R2 bits are set to "1"s as a RESET condition occurs.



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