Z87C33 Datasheet, PDF (38/72 Pages) Zilog, Inc. – CMOS Z8® MCU Consumer Controller Processor

Z87C33
CMOS Z8“ MCU Consumer Controller Processor
32
Control Registers
The Z87C33 offers 2 banks of registers, as detailed in the following pages.
Expanded Register File, Bank 0h
Bank 0h of the Expanded Register File contains 15 Control registers that perform
the Timer, Prescaler, Port, Interrupt, Flag, and Pointer functions, as shown in
Tables 16 through 30. Table 15 lists the reset states of all 15 Bank 0h Control reg-
isters.
Table 15. Expanded Register File Registers—Reset States
D7
D6
D5
D4
D3
D2
D1
D0
F0h
Reserved
F1h
TMR
0
0
0
0
0
0
0
0
F2h
T1
X
X
X
X
X
X
X
X
F3h
PRE1
X
X
X
X
X
X
0
0
F4h
T0
X
X
X
X
X
X
X
X
F5h
PRE0
X
X
X
X
X
X
X
0
F6h
P2M*
1
1
1
1
1
1
1
1
F7h
P3M*
0
0
0
0
0
0
0
0
F8h
P01M
0
1
0
0
1
1
0
1
F9h
IPR
X
X
X
X
X
X
X
X
FAh
IRQ
0
0
0
0
0
0
0
0
FBh
IMR
0
X
X
X
X
X
X
X
FCh
FLAGS
X
X
X
X
X
X
X
X
FDh
RP
0
0
0
0
0
0
0
0
FEh
SPH
0
0
0
0
0
0
0
0
FFh
SPL
0
0
0
0
0
0
0
0
Note: *Not reset with a Stop-Mode Recovery.
Timer Mode Register
The Timer Mode Register, TMR, controls timing and counter functions. READ/
WRITE and reset states for bits D7–D0 are listed in Table 16.
PS015601-1003