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參數(shù)資料
| 型號： | μPD98402A |
| 廠商： | NEC Corp. |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| 中文描述： | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| 文件頁數(shù)： | 8/26頁 |
| 文件大?。?/td> | 178K |
| 代理商： | ΜPD98402A |
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μ
PD98402A
8
1. PIN FUNCTIONS
PMD Interface
Symbol
Pin No.
I/O
I/O Level
Function
RDIC
66
I
Pseudo ECL
Complement (–)
These pins are used to input receive serial data when serial
interface mode is used (PSEL pin input = low level). Ground
them when Parallel interface mode is used.
RDIT
65
I
Pseudo ECL
True (+)
RCIC
63
I
Pseudo ECL
Complement (–)
These pins are used to input the receive system clock when
serial interface mode is used (PSEL pin input = low level).
Clocks are input in synchronization with receive data. Ground
them when parallel interface mode is used.
RCIT
62
I
Pseudo ECL
True (+)
TDOC
59
O
Pseudo ECL
Complement (–)
These pins are used to output transmit serial data when serial
interface mode is used (PSEL pin input = low level). They are
open-drain pins. Terminate them with V
DD
–2 V via a 50
resistor. To be undefined after reset.
TDOT
58
O
Pseudo ECL
True (+)
TCOC
54
O
Pseudo ECL
Complement (–)
These pins are used to output transmit clocks when serial
interface mode is used (PSEL pin input = low level). Transmit
clocks to be input to the TFKC/TFKT pins are output passing
through internal gates. They are open-drain pins. Terminate
them with V
DD
–2 via a 50
resistor. To be undefined after
reset.
TCOT
53
O
Pseudo ECL
True (+)
TFKC
50
I
Pseudo ECL
Complement (–)
These pins are used to input transmit system clocks when
serial interface mode is used (PSEL pin input = low level).
Transmit data output from the TDOC/TDOT pins is output in
synchronization with clocks that are input to these pins.
Ground them when parallel interface mode is used.
TFKT
49
I
Pseudo ECL
True (+)
RPD0-RPD7
77-73, 71-69
I
TTL
These pins are used to input receive parallel data when
parallel interface mode is used (PSEL pin input = high level).
Leave them open when serial interface mode is used.
RPC
67
I
TTL
This pin is used to input the receive system clock when
parallel interface mode is used (PSEL pin input = high level).
Input clocks synchronous with the receive data. Leave it open
when serial interface mode is used.
TPD0-TPD7
35-39, 43-45
O
CMOS
These pins are used to output transmit parallel data when
parallel interface mode is used (PSEL pin input = high level).
Leave them open when serial interface mode is used.
TPC
46
O
CMOS
This pin is used to output transmit clocks when parallel
interface mode is used (PSEL pin input = high level). Transmit
clocks to be input to the TFC pin are output passing through
internal gates. Leave it open when serial interface mode is
used.
TFC
48
I
TTL
This pins is used to input transmit system clocks when parallel
interface mode is used (PSEL pin input = high level). Transmit
data output from pins TPD0 to TPD7 are output in
synchronization with the clocks input to this pin. Leave it open
when serial interface mode is used.
PSEL
78
I
CMOS
This pin is used to select the mode for PMD interface serial/
parallel interface.
Low level: Serial interface mode
High level: Parallel interface mode
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