Z89175 Datasheet, PDF (33/68 Pages) Zilog, Inc. – Voice Processing Controllers

Zilog
r7 r6 r5 r4 r3 r2 r1 r0
Group 15 (F) Control Registers
R255
R253
R240
The upper nibble of the register file address
provided by the register pointer specifies
the active working-register group
Group 14 (E)
Group 13 (D)
R239
R223
Z89175/Z89176
Voice Processing Controllers
2
Group 4 (4)
Specified Working
Group 3 (3) _{Register Group}
Group 2 (2)
Group 1 (1)
Group 0 (0)
I/O Ports
R79
The upper nibble
of the register
R63 ^{file address}
provided by the
instruction points
R47 ^{to the specified}
working-register
group
R31
R15
R3
R0
Figure 20. Register Pointer
DS97TAD0100
PRELIMINARY
33