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參數(shù)資料
| 型號： | MC68177 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 尋呼電路 |
| 英文描述： | FLEXchip Decoder(FLEXchip譯碼器) |
| 中文描述： | TELECOM, PAGING DECODER, PQFP32 |
| 封裝： | TQFP-32 |
| 文件頁數(shù)： | 3/8頁 |
| 文件大小： | 180K |
| 代理商： | MC68177 |
MC68177
Pin Description
PRELIMINARY
MOTOROLA
MC68177
3
Serial clock for SPI communications
PIN DESCRIPTION
Table 1
MC68177 Pin Description
Symbol
I/O
32-pin QFP
Pin #
Description
VDD
(2 pins)
3, 13
Power
VSS
(2 pins)
7, 29
Ground
OSCPD
INPUT
2
Internal oscillator power down.
Connected to
VSS
Connected to
VDD
when using internal oscillator.
when using an external source.
TEST2
INPUT
4
IC manufacturing test mode pin.
Normally connected to
VSS
.
TEST3
INPUT
8
IC manufacturing test mode pin.
Normally connected to
VSS
.
RESET
INPUT
24
Active low reset to the FLEX decoder IC
EXTS1
INPUT
11
MSb of the symbol currently being decoded
EXTS0
INPUT
12
LSb of the symbol currently being decoded
LOBAT
INPUT
10
Low battery detect input
SS
INPUT
27
Slave select for SPI communications
SCK
INPUT
28
MOSI
INPUT
30
Data input for SPI communications
MISO
OUTPUT
31
Three-state data output for SPI communications
READY
OUTPUT
26
Driven low when the IC is ready for an SPI packet
CLKOUT
OUTPUT
32
38.4 kHz or 40 kHz clock output (derived from oscillator)
SYMCLK
OUTPUT
14
Recovered symbol clock
EXTAL
INPUT
6
76.8 kHz crystal input or external input
XTAL
OUTPUT
5
76.8 kHz clock output
S0/IFIN
OUTPUT/
INPUT
23
Receiver control output when using external demodulator
Limited IF input when using internal demodulator
S1
-
S7
OUTPUT
22, 21, 20,
19, 18, 16, 15
Eight three-state receiver control ports
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