z87001 ZiLOG Semiconductor, z87001 Datasheet - Page 48

• Manufacturer Part Number: z87001
• Description: Romless Spread Spectrum Cordless Phone Controller
• Manufacturer: ZiLOG Semiconductor

Z87001/Z87L01
ROMless Spread Spectrum Cordless Phone Controller
RFRX_PWR_CTRL
Field
RFRX_POLARITY
RFRX_PWR_ON
RESERVED
RFRX_PWR_OFF
Notes:
48
1. RFRX_POLARITY. Caution: notice the inverse polarity of the TXSW pin.
2. RFRX_PWR_ON, RFRX_PWR_OFF. Controls the TXSW output pin. The turn-on and off times are given in number of trans-
3. Changes to these values take effect immediately.
4. To disable transmit power continuously, clear TX_ENABLE.
mitted bit periods and are referenced to the TRANSMIT (!) Frame Counter. Only the 7 LSBits of the 9-bit value are program-
mable. The two MSBits have fixed values which depend on whether base station or handset is selected. For
RFRX_PWR_ON, the two bits are “00” on the base and “01” on the handset. For RFRX_PWR_OFF, the two bits are “01”
on the base and “10” on the handset.
Bank 0
Bit Position
f---------------
-edcba98--------
--------7-------
---------6543210
Table 36. Bank 0 Register Description
P R E L I M I N A R Y
EXT7
R/W
W
W
W
W
R
R
R
R
Data
xXh
xXh
0
1
Controls the polarity of the TXSW (and RXSW)
output pins
Returns 0
TXSW active Low and RXSW active High
TXSW active High and RXSW active Low
Determines TXSW output pin turn-on time
referenced to the transmit frame counter
Returns 0
Bits 6-0 of turn-on time (=(x modulo 128) -1)
Returns 0
No effect
Determine TXSW output pin turn-off time
referenced to the transmit frame counter
Returns 0
Bits 6-0 of turn-off time (=(x modulo 128) -1)
Description
DS96WRL0800
Zilog