UPD17717 Datasheet, PDF (50/408 Pages) NEC – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DEDICATED HARDWARE FOR DIGITAL TUNING SYSTEM

µPD17717, 17718, 17719
5.7 General Register Pointer (RP)
5.7.1 Configuration of General Register Pointer
Figure 5-7 shows the configuration of the general register pointer.
As shown in the figure, the general register pointer consists of 7 bits including 4 bits of system register address
7DH (RPH) and the high-order 3 bits of address 7EH (RPL).
Figure 5-7. Configuration of General Register Pointer
Address
Name
Symbol
Bit
Data
7DH
7EH
General register pointer
(RP)
RPH
RPL
b3 b2 b1 b0 b3 b2 b1 b0
M
LB
S
SC
B
BD
Power-ON reset
WDT&SP reset
CE reset
Clock stop
0
0
0
Retained
0
0
0
Retained
50