Z87001 Datasheet, PDF (41/51 Pages) Zilog, Inc. – ROMless Spread Spectrum Cordless Phone Controller

Zilog
Z87001/Z87L01
ROMless Spread Spectrum Cordless Phone Controller
Table 23. Bank 2 Register Description
RSSI
Bank 2
EXT3
Field
Bit Position
R/W Data
Description
1
RESERVED
fedcba98-------- R
Returns 0
W
No effect
RSSI_DATA
-------76543210
Access to 8-bit ADC (can be used for RSSI data)
R XXh Returns latest value on 8-bit DAC
W
No effect
Note:
RSSI_DATA. This value is sampled once per frame (4ms) approximately at bit 72 (middle) of the received data.
Table 24. Bank 2 Register Description
CORE_BIAS
Field
Bank 2
Bit Position
EXT4
R/W Data
Description
RESERVED
fed------------- R
W
Returns 0
No effect
CORE_BIAS_DATA
---cba9876543210
Stores bias value for correction of downconverter’s
NCO.
R
Returns 0
W xXXXh Updates bias value
Notes:
CORE_BIAS_DATA.This value is used if the USE_CORE_BIAS register field is set. It is encoded as a 2’s complement number.
The unit is 125 Hz.
Table 25. Bank 2 Register Description
MOD_PWR_CTRL
Field
Bank 2
Bit Position
EXT5
R/W Data
Description
RESERVED
f--------------- R
W
Returns 0
No effect
MOD_PWR_ON
-edcba98--------
R
W
Determines modulator turn-on time referenced to the
transmit frame counter
Returns 0
xXh Bits 6-0 of turn-on time (=(x modulo 128) -1)
RESERVED
--------76543210 R
W
Returns 0
No effect
Notes:
1. MOD_PWR_ON. Controls the turn-on time for the internal modulator and NCO. Only the 7 LSBits of the 9-bit value necessary
to encode an event (from frame counter 0 to 371) are programmable. The two MSBits have fixed values which depend on
whether base station or handset is selected: “00” on the base and “01” on the handset. The modulator’s turn-off time occurs
a fixed time (number of bits) after the turn-on time: 144 bits on the base station, 148 bits on the handset.
2. Changes to this value take effect immediately.
3. To disable the modulator continuously, clear TX_ENABLE
DS96WRL0800
PRELIMINARY
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