z86e02sl1925 ZiLOG Semiconductor, z86e02sl1925 Datasheet - Page 38

• Manufacturer Part Number: z86e02sl1925
• Description: General-purpose Otp Mcu With 14 I/o Lines
• Manufacturer: ZiLOG Semiconductor

PS014802-0903
Stack Pointer
General-Purpose Registers (GPR)
Note:
The Z8
within the 60 general-purpose registers from 04h to 3Fh.
These registers are undefined after the device is powered up. The registers keep their most
recent value after any reset, as long as the reset occurs in the V
ating range.
®
Register R254 is designated as a general-purpose register and
is set to 00h after any reset or Stop-Mode Recovery.
features an 8-bit Stack Pointer (R255) used for the internal stack that resides
FDh
FF
F0
3F
2F
1F
0F
40
30
20
10
00
* Expanded RegisterGroup [0] is selected in this figure
This upper nibble of the register file addresses
provided by the register pointer specifies
the active working-register group.
by handling bits D3 to D0 as “0” in Register R253(RP).
r7 r6 r5 r4
Figure 15. Register Pointer
Specified Working
Register Group 1
Register Group 0
Register Group
I/O Ports
Must be 0
r3 r2 r1 r0
General-Purpose OTP MCU with 14 I/O Lines
R253
(Register Pointer)
R15 to R0
The lower nibble
of the register
file addresses
provided by the
instruction points
to the specified
register.
R15 to R0
R15 to R4 *
R3 to R0
CC
volt-age-specified oper-
Z86E02 SL 1925
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