Z87C33 Datasheet, PDF (47/72 Pages) Zilog, Inc. – CMOS Z8® MCU Consumer Controller Processor

Z87C33
CMOS Z8“ MCU Consumer Controller Processor
41
Bit
Bit
Position Field
D1
User
D0
User
Note: *Not affected by RESET.
R/W
R/W
R/W
Reset
State
X
X
Description
User Flag F2*
User Flag F1*
Register Pointer Register
The Register Pointer Register, RP, controls pointer functions in the working regis-
ters. READ/WRITE and reset states for bits D7–D0 are listed in Table 28.
Table 28. Register Pointer—RP FDh/R253 Bank 0h: READ/WRITE
Bit
D7
R/W
R/W
Reset
0
Note: R = Read, W = Write.
D6 D5
R/W R/W
0
0
D4
R/W
0
D3
R/W
0
D2
D1
D0
R/W R/W R/W
0
0
0
Bit
Bit
Position Field
Reset
R/W State Description
D7–D4
Working
Register
Pointer
R/W
0 Working Register Pointer
D3–D0
Expanded
R/W
Register File
Bank
0 Expanded Register File Bank
General Purpose Register
The General Purpose Register (GPR) READ/WRITE and reset states for bits D7–
D0 are listed in Table 29.
Table 29. General Purpose—GPR FEh/R254 Bank 0h: READ/WRITE
Bit
D7
R/W
R/W
Reset
0
Note: R = Read, W = Write.
D6 D5
R/W R/W
0
0
D4
R/W
0
D3
R/W
0
D2
D1
D0
R/W R/W R/W
0
0
0
PS015601-1003