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參數(shù)資料
| 型號： | EM78P447SAP |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | 8-BIT MICRO-CONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 8/55頁 |
| 文件大小： | 1730K |
| 代理商： | EM78P447SAP |
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EM78P447S
OTP ROM
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
IOC7
R7
ACC
R3
STACK 1
STACK 2
STACK 3
STACK 4
STACK 5
P C
ROM
Instruction
Register
Instruction
Decoder
ALU
Interrupt
Control
R4
RAM
W DT Timer
Prescale
r
Oscillator/Timing
Control
TW DT
R1(TCC)
Sleep
&
W ake
Control
DATA & CONTROL BUS
/INT
TCC
OSCI
OSCO
/RESET
P
6
0
P
6
1
P
6
2
P
6
3
P
6
4
P
6
5
P
6
6
P
6
7
P
7
0
P
7
1
P
7
2
P
7
3
P
7
4
P
7
5
P
7
6
P
7
7
Fig. 2 Functional Block Diagram
4.1 Operational Registers
1. R0 (Indirect Addressing Register)
R0 is not a physically implemented register. Its major function is to act as an indirect addressing
pointer. Any instruction using R0 as a pointer actually accesses data pointed by the RAM Select
Register (R4).
2. R1 (Time Clock /Counter)
Increased by an external signal edge, which is defined by TE bit (CONT-4) through the TCC pin, or by
the instruction cycle clock.
Writable and readable as any other registers.
Defined by resetting PAB (CONT-3).
The prescaler is assigned to TCC, if the PAB bit (CONT-3) is reset.
The contents of the prescaler counter will be cleared only when TCC register is written a value.
This specification is subject to change without prior notice.
06.25.2003 (V1.1)
8
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