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參數資料
| 型號： | W9310 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 通信及網絡 |
| 英文描述： | Direct Sequence Spread Spectrum Transceiver(直接序列擴展頻譜收發器) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP80 |
| 封裝： | PLASTIC, QFP-80 |
| 文件頁數： | 12/36頁 |
| 文件大小： | 220K |
| 代理商： | W9310 |
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W9310
- 12 -
I/O Characteristics, continued
PARAMETER
SYM.
I
OH1
CONDITIONS
V
OH
= 2.4V
V
DD
V
OL
= V
SS
0.4V
V
OH
= 2.4V
V
DD
V
OL
= V
SS
0.4V
V
OH
= 2.4V
V
DD
V
OL
= V
SS
0.4V
-
-
-
-
MIN.
0
TYP.
-
MAX.
2
UNIT
mA
"H" Output Current 1
(Note 4)
"L" Output Current 1
(Note 4)
I
OL1
-2
-
0
mA
"H" Output Current 2
(Note 5)
I
OH2
0
-
1
mA
"L" Output Current 2
(Note 5)
I
OL2
-1
-
0
mA
"H" Output Current 3
(Note 6)
I
OH3
0
-
4
mA
"L" Output Current 3
(Note 6)
I
OL3
-4
-
0
mA
Output Low Voltage
Output High Voltage
Input Low Voltage
Input High Voltage
V
OL
V
OH
V
IL
V
IH
0
-
-
-
-
0.4
V
DD
0.3 V
DD
V
DD
V
V
V
V
2.4
0
0.7 V
DD
Notes:
1. Pins 5, 6, 9, 10, 16, 17, 18, 21, 25, 32, 33, 36, 46, 48, 49, 50, 57, 58, 59, 65, and 80.
Input buffer has pull-down resistor and will be at V
SS
when left open.
2. Pins 3, 8, 19, 40, 41, 51, 52, 53, 54, 55, 56, 60, 61, 62, 64, and 78.
3. Pins 26, 27, 28, 29, 30, 31, and 79.
Input buffer has pull-up resistor and will be at V
DD
when left open.
4. Pin 2.
5. Pins 7, 13, 14, 15, 20, 22, 24, 26, 27, 28, 29, 30, 31, 37, 38, 39, 43, 45, 47, 66, 67, 68, 69, 74, 75, 76, 77, and 79.
6. Pins 44, 71, and 73.
Output buffer is tri-state (pin 73 is not included).
OPERATIONAL DESCRIPTION
The operation of the W9310 in various operating modes is described below.
Full-duplex Operation
Although the W9310 actually uses only a simplex channel for communication with the remote device,
full-duplex is provided by using the time-division duplex (TDD), or ping-pong (PP), protocol.
The TDD protocol configures the W9310 alternately as a transmitter and as a receiver. When two
devices are communicating with each other, one is programmed to be the master, while the other is
programmed to the slave. The TDD protocol ensures that while the master is transmitting, the slave is
receiving and vice versa. The result is that as far as the user is concerned, the communication link is
full-duplex. In order to achieve this, it is necessary for the W9310 to transmit at a higher rate than the
actual user data rate. Ideally, for TDD operation, with 100% efficiency and 0% overhead, the W9310
must transmit the data at twice the user data rate since the W9310 has only half the time to transmit
the user data (during the other half period, the W9310 is receiving from the remote station).
Overhead such as the preamble unique word (UW) and other signaling information bits result in the
W9310 transmitting at 2.6 times the user data rate. The size of the FIFOs on the W9310 is designed
to provided sufficient buffer during both transmit and receive operations so that underflow or overflow
of the FIFOs does not occur.
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