Z89139 View Datasheet(PDF) - Zilog
Part Name
Description
MFG CO.
'Z89139' PDF : 66 Pages View PDF
Zilog
Z89138/Z89139
Voice Processing Controllers
DSP Z8 Mail Box
DSP can only read information from these registers. Since
To receive information from the DSP, the Z8 uses eight in-
coming registers which are mapped in the Z8 extended
Register File (Bank B, 08 to 0F). The DSP treats these as
four 16-bit registers that correspond to the eight incoming
the DSP uses a 16-bit data format and the Z8 an 8-bit data
format, eight outgoing registers of the Z8 correspond to
four DSP registers. The DSP can only read information
from the outgoing registers.
1
Z8 registers (Figure 31).
Both the outgoing registers and the incoming registers
The Z8 can supply the DSP with data through eight outgo- share the same DSP address (EXT3-EXT0).
ing registers mapped into both the Z8 Expanded Register
File (Bank B, Registers 00 to 07) and the external register
interface of the DSP. These registers are Read/Write and
Note: The Z8 can read and write to ERF Bank B R00-R07,
Registers 08-0F are Read-Only from the Z8.
can be used as general-purpose registers of the Z8. The
(B)00, (B)01
(B)02, (B)03
(B)04, (B)05
(B)06, (B)07
(B)08, (B)09
(B)0A, (B)0B
(B)0C, (B)0D
(B)0E, (B)0F
(F)0C
D7, D1
Outgoing Registers
Incoming Registers
DSP Interrupt Control Register
EXT0
EXT1
EXT2
EXT3
EXT0
EXT1
EXT2
EXT3
EXT4
D/A and A/D Data Registers
EXT5
D9
Analog Control Register
D2
EXT6
Field
Outgoing [0] (B)00
Outgoing [1] (B)01
Outgoing [2] (B)02
Outgoing [3] (B)03
Outgoing [4] (B)04
Outgoing [5] (B)05
Outgoing [6] (B)06
Outgoing [7] (B)07
Figure 31. Z8-DSP Interface
Table 12. Z8 Outgoing Registers (Read-Only from DSP)
Position
76543210
76543210
76543210
76543210
76543210
76543210
76543210
76543210
Attrib
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Value
%NN
%NN
%NN
%NN
%NN
%NN
%NN
%NN
Label
(B)00/DSP_ext0_hi
(B)01/DSP_ext0_lo
(B)02/DSP_ext1_hi
(B)03/DSP_ext1_lo
(B)04/DSP_ext2_hi
(B)05/DSP_ext2_lo
(B)06/DSP_ext3_hi
(B)07/DSP_ext3_lo
DS97TAD0201
PRELIMINARY
43
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