PCD3349 查看數據表（PDF） - Philips Electronics
零件编号
产品描述 (功能)
比赛名单
PCD3349 Datasheet PDF : 20 Pages
| |||
Philips Semiconductors
8-bit microcontroller with DTMF generator
Product specification
PCD3349A
6 FREQUENCY GENERATOR
A versatile frequency generator section is provided (see
Fig.3). For normal operation, use a 3.58 MHz quartz
crystal or PXE resonator. The frequency generator
includes precision circuitry for dual tone multifrequency
(DTMF) signals, which is typically used for tone dialling
telephone sets.
The TONE output can alternatively issue twelve modem
frequencies for data rates between 300 and 1200 bits/s.
In addition to DTMF and modem frequencies, two octaves
of musical scale in steps of semitones are available.
6.1 Frequency generator derivative registers
Table 2 gives the derivative addresses, mnemonics and access types of the frequency generator derivative registers.
The addresses 03H to FFH are not used.
Table 2 Addresses of the frequency generator derivative registers
ADDRESS REGISTER
7
6
5
4
3
2
1
0
01H
HGF(1)
H7
H6
H5
H4
H3
H2
H1
H0
02H
LGF(2)
L7
L6
L5
L4
L3
L2
L1
L0
Notes
1. HGF = High Group Frequency; access type W.
2. LGF = Low Group Frequency; access type W.
dbook, full pagewidth
8
HGF
REGISTER
DIGITAL
SINE WAVE
SYNTHESIZER
8 internal bus
SWITCHED-
CAPACITOR
BANDGAP
VOLTAGE
REFERENCE
8
LGF
REGISTER
DIGITAL
SINE WAVE
SYNTHESIZER
DAC
SWITCHED-
CAPACITOR
LOW-PASS FILTER
DAC
RC LOW-PASS
FILTER
TONE
MBG099
1998 May 11
Fig.3 Block diagram of the frequency generator section.
6
Share Link: 