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參數資料
| 型號： | PCD3352AT |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-bit microcontrollers with DTMF generator and 128 bytes EEPROM |
| 中文描述： | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | 7.50 MM, PLASTIC, SO-28 |
| 文件頁數： | 8/36頁 |
| 文件大?。?/td> | 155K |
| 代理商： | PCD3352AT |
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1999 Oct 28
8
Philips Semiconductors
Product specification
8-bit microcontrollers with DTMF generator
and 128 bytes EEPROM
PCA3351C; 52C; 53C;
PCD3351A; 52A; 53A
6
FREQUENCY GENERATOR
A versatile frequency generator section is provided (see
Fig.4). 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.
Theirfrequenciesareprovidedinpurelysinusoidalformon
the TONE output or as square waves on the port line
P1.7/MDY.
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.
When no tones are generated the TONE output is in
3-state mode.
6.1
Frequency generator derivative registers
6.1.1
H
IGH AND
L
OW
G
ROUP
F
REQUENCY REGISTERS
Table 4 gives the addresses, symbols and access types of the High Group Frequency (HGF) and Low Group Frequency
(LGF) registers.
Table 4
Hexadecimal addresses, symbols, access types and bit symbols of the frequency registers
6.1.2
M
ELODY
C
ONTROL
R
EGISTER
(MDYCON)
Table 5
Melody Control Register, MDYCON (address 13H; access type R/W)
Table 6
Description of MDYCON bits
REGISTER
ADDRESS
REGISTER
SYMBOL
ACCESS
TYPE
BIT SYMBOLS
7
6
5
4
3
2
1
0
11H
12H
HGF
LGF
W
W
H7
L7
H6
L6
H5
L5
H4
L4
H3
L3
H2
L2
H1
L1
H0
L0
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
EMO
BIT
SYMBOL
EMO
DESCRIPTION
7 to 1
0
These bits are set to a logic 0.
Enable Melody Output. If bit EMO = 0, then P1.7/MDY is a standard port line.
If bit EMO = 1, then P1.7/MDY is the melody output. EMO = 1 does not inhibit the port
instructions for P1.7/MDY. Therefore the state of both port line and flip-flop may be read
in and the port flip-flop may be written by port instructions. However, the port flip-flop of
P1.7/MDY must remain set to avoid conflicts between melody and port outputs.
When the HGF contents are zero while EMO = 1, P1.7/MDY is in the HIGH state.
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