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UPD17P136ACT Datasheet(PDF) 87 Page - NEC

Part # UPD17P136ACT
Description  4-BIT SINGLE-CHIP MICROCONTROLLER
PDF  292 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD17P136ACT Datasheet(HTML) 87 Page - NEC

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CHAPTER 8 GENERAL REGISTER (GR)
68
Figure 8-1. General Register Configuration
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Address
Name
Symbol
Bits
Data
Reset
000
0000000
b3 b2 b1 b0 b3 b2 b1 b0
B
C
D
RPH
RPL
7DH
7EH
General register pointer
(RP)
General Register (16 nibbles)
System register
RP
System register
Column address
Both banks have
the same system
register.
General register
when RP = 00010B
The general register pointer
(RP) can be used to specify
any row address in address
locations 0H to 7H of BANK0
and BANK1. However, note
that row addresses 0H to 6H
of BANK1 are unmounted
memory locations and should
therefore not be specified.
0123456789
A
B
C
D
E
F
BANK0
BANK1
Unmounted
(Row addresses 0H to 6H of BANK1
are unmounted memory locations.
RP should therefore not specify a
row address in this area).



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