參數(shù)資料
型號: PCA5010H
廠商: NXP Semiconductors N.V.
英文描述: Pager baseband controller
中文描述: 傳呼機(jī)基帶控制器
文件頁數(shù): 42/112頁
文件大?。?/td> 627K
代理商: PCA5010H
1998 Nov 02
42
Philips Semiconductors
Product specification
Pager baseband controller
PCA5010
6.15
Tone generator
6.15.1
F
UNCTION
The tone generator is implemented by a programmable divider from 76.8 kHz. An 8-bit value is used to define the cycle
of a modulo N counter. The output of the modulo N counter is divided-by-2 to produce a symmetrical output signal.
The counter is running when enabled.
The output frequency at the pin AT is defined as:
if TFREQ
1. If TFREQ = 0 then f
AT
= 76.8 kHz.
A secondary clock signal can be used as clock input to the modulo N counter. This input is required to generate the
accurate resonance frequency of certain acoustic alerters (e.g. 512, 687, 1024, 1365, 2048, 2730 or 4096).
The tone volume can be controlled by setting the frequency on or off alerter resonance.
6.15.2
I
NTERFACES
SFR ADDR.
BIT 7
BIT 6
BIT 5
TFREQ5
BIT 4
TFREQ4
BIT 3
TFREQ3
BIT 2
TFREQ2
BIT 1
TFREQ1
BIT 0
TFREQ0
TGCON (92H)
TG0 (93H)
ENB
TFREQ7
CLK2
TFREQ6
Fig.23 Wake-up interrupt sequence.
handbook, full pagewidth
9600 Hz
MGR124
internal SET flag
counter value
SET bit in SFR
LOAD
WUP flag on 1 V side
generates DC/DC
wake-up if required
WUP in WUCON SFR
(generates interrupt if enabled)
CPL in WUCON SFR
(generates interrupt if enabled)
cleared by
software
cleared by
software
set by
hardware
set by
hardware
WUP remains
HIGH if not cleared
set by
hardware
m
m
1
0
SET to transfer
modified WUP
to 1 V side
only WUCON data to be transferred,
no reload for WUC0, WUC1
SFR and 1 V WUP are different
f
AT
TFREQ
76.8 kHz
=
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