z86e31 ZiLOG Semiconductor, z86e31 Datasheet - Page 34

• Manufacturer Part Number: z86e31
• Description: Z8 4k Otp Microcontroller
• Manufacturer: ZiLOG Semiconductor

FUNCTIONAL DESCRIPTION (Continued)
Z86E30/E31/E40
Z8 4K OTP Microcontroller
34
6F
FF
F0
EF
70
60
5F
50
4F
3F
2F
1F
10
0F
80
7F
40
30
20
00
The upper nibble of the register file address
provided by the register pointer specifies
the active working-register group.
* Expanded Register Group (0) is selected
in this figure by handling bits D3 to D0 as
"0" in Register R253 (RP).
r7 r6 r5 r4
Figure 25. Register Pointer
Register Group 1
Register Group F
Specified Working
Register Group 0
P R E L I M I N A R Y
Register Group
I/O Ports
r3 r2 r1 r0
R253
(Register Pointer)
Note: Registers 80H
through EFH are
available in the Z86C30
only.
The lower nibble
of the register
file address
provided by the
instruction points
to the specified
register.
R15 to R0
R15 to R4*
R3 to R0*
DS97Z8X0502
Zilog