UPD17073 NEC, UPD17073 Datasheet - Page 33
UPD17073
Manufacturer Part Number
UPD17073
Description
4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
Manufacturer
NEC
Datasheet
1.UPD17073.pdf
(226 pages)
- Current page: 33 of 226
- Download datasheet (2Mb)
5.2 Address Register (AR)
5.2.1 Configuration of address register
through AR0). However, the higher 4 bits are always fixed to 0, and therefore, the address register actually functions
as a 12-bit register.
Figure 5-2 shows the configuration of the address register.
As shown in this figure, the address register consists of 16 bits of the system register: 74H through 77H (AR3
Remark Power-ON : On power-ON reset
Power-ON
Clock stop
CE
Address
Symbol
Name
Data
Clock stop : On execution of clock stop instruction
CE
Bit
Figure 5-2. Address Register Configuration
: On CE reset
b
0
3
b
0
2
74H
AR3
0
0
0
b
0
1
b
0
0
M
B
b
S
3
b
75H
AR2
2
Address register (AR)
0
0
0
b
1
b
0
b
3
b
76H
AR1
2
0
0
0
b
1
b
0
b
3
PD17072,17073
b
AR0
2
77H
0
0
0
b
1
b
B
L
S
0
33
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