Z87L00 Просмотр технического описания (PDF) - Zilog

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Z87L00

SPREAD SPECTRUM CONTROLLERS

Zilog 

Zilog

Z87000/Z87L00

Spread Spectrum Controllers

Bank 0 Registers

Table 34. Bank 0 Register Description

1

EXT0

EXT1

EXT2

EXT3

EXT4

RESERVED

Bank 0

EXT5

Field

Bit Position

R/W Data

Description

RESERVED

fedcba9876543210

R

W

Returns 0

No effect

INT_SYM_ERR0

Field

RESERVED

INT_SYM_ERR0

Table 35. Bank 0 Register Description

Bank 0

Bit Position

fedcba98--------

--------76543210

EXT6

R/W

R

W

R

W

Data

Description

Returns 0

No effect

Read access to the integrated symbol error from the

bit synchronizer’s second order loop

XXh Reads error data bits [7..0] (bits [23..8] are in bank1,

EXT2)

No effect

Table 36. Bank 0 Register Description

RFRX_PWR_CTRL

Field

Bank 0

Bit Position

EXT7

R/W Data

Description

RFRX_POLARITY

f---------------

R

W

Controls the polarity of the RFRX (and RXON)

output pins

Returns 0

0 RFRX active Low and RXON active High

1 RFRX active High and RXON active Low

RFRX_PWR_ON

-edcba98--------

Determines RFRX output pin turn-on time

referenced to the transmit frame counter

R

Returns 0

W xXh Bits 6-0 of turn-on time (=(x modulo 128) -1)

RESERVED

--------7------- R

W

Returns 0

No effect

RFRX_PWR_OFF

---------6543210

Determine RFRX output pin turn-off time

referenced to the transmit frame counter

R

Returns 0

W xXh Bits 6-0 of turn-off time (=(x modulo 128) -1)

Notes:

1. RFRX_POLARITY. Caution: notice the inverse polarity of the RFRX pin.

2. RFRX_PWR_ON, RFRX_PWR_OFF. Controls the RFRX output pin. The turn-on and off times are given in number of trans-

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.

3. Changes to these values take effect immediately.

4. To disable transmit power continuously, clear TX_ENABLE.

DS96WRL0501

PRELIMINARY

1-47

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