PCD5043 Ver la hoja de datos (PDF) - Philips Electronics
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PCD5043 Datasheet PDF : 24 Pages
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Philips Semiconductors
DECT burst mode controller
Objective specification
PCD5043
6.6.3 WATCHDOG
The PCD5043 is equipped with a watchdog timer, which
generates a reset towards an external device (e.g. a µC)
after time-out. Two (fixed) time-out periods can be
programmed; 1.25 s and 82 s. The watchdog function can
be disabled by using the EN_WATCHDOG input pin.
6.6.4 POWER-DOWN
The PCC may switch off the 6.912 MHz internal clock, to
enter a power saving mode. All blocks, running on this
clock are then switched off (i.e. RF-interface, cipher block,
speech interface, PCC). This is called the power-down
state, and is only used in the handset mode.
The 13.824 MHz clock is never switched off. The Timing
Control, microcontroller interface, and Bus Controller keep
running, in order to remain synchronous with a base
station, and to keep the wake-up circuitry active. During
power-down the external microcontroller has still access to
the common data area.
6.7 Survey of registers
For a survey of all addresses occupied refer to
Tables 1 and 2. Some of the address locations are used
differently for read and write. The addresses 000 to 7DF
are occupied by RAM memory, while the upper 32 bytes
are assigned to the hardware registers. A part of the RAM
memory is allocated for use by the RF block, cipher block,
and the speech interface.
Table 1 Hardware register addresses
ADDRESS
WRITE
READ
7E0
−
−
7E1
S-DATA1
−
7E2
S-DATA2
−
7E3
S-DATA3
RMT-STAT
7E4
−
RF-STATUS
7E5
B-field-shift
−
7E6
B-field-loc.
−
7E7
A-field-loc.
−
7E8
window-wide-off −
7E9
window-wide-on −
7EA
window-narrow-off −
7EB
window-narrow-on −
7EC
T-power-rmp-on −
7ED
synth-off
−
7EE
RF-control-port
sync-status
7EF
slot-cnt-off
slot-counter-copy
7F0
frame-cnt-ref
RSSI
7F1
sync-ref-preset
bit-counter-copy1
7F2
bit-counter-preset bit-counter-copy2
7F3
frame-counter
frame-counter
7F4
slot-counter
slot-counter
7F5
sync-control
sync-control
7F6
BMC-mode
BMC-mode
7F7
correlator-threshold measure
7F8
watchdog-1
−
7F9
watchdog-2
−
7FA
−
−
7FB
−
−
7FC
interrupt-event
interrupt-event
7FD
interrupt-enable interrupt-enable
7FE
interrupt-reset
−
7FF
controller mode
controller mode
1996 Oct 31
15
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