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EM78P447NAM Datasheet(PDF) 8 Page - ELAN Microelectronics Corp

Part # EM78P447NAM
Description  8-BIT MICRO-CONTROLLER
Download  57 Pages
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Manufacturer  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78P447NAM Datasheet(HTML) 8 Page - ELAN Microelectronics Corp

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EM78P447N
OTP ROM
4. FUNCTION DESCRIPTION
IO C 5
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
IO C 6
R6
IO C 7
R7
ACC
R3
ST ACK 1
ST ACK 2
ST ACK 3
ST ACK 4
ST ACK 5
P C
RO M
In stru ctio n
Re g is te r
In stru ctio n
De c o d e r
AL U
In te rru p t
Co n tro l
R4
RA M
W D T Tim e r
Pre s c a le
r
O s c illa to r/T im in g
Co n tro l
WD T
Tim e
-o u t
R1 (T CC)
Sle e p
&
Wa k e
Co n tro l
DA T A & C O NT R O L B U S
/IN T
TC C
OS C I
OS C O
/R E SET
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.
This specification is subject to change without prior notice.
10.21.2004 (V1.0)
8


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