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參數(shù)資料
| 型號： | EKK6111 |
| 英文描述： | QFN Packaged, ±15kV ESD Protected, +3V to +5.5V, 300nA, 250kbps, RS-232 Transceivers with Enhanced Automatic Powerdown and a Separate Logic Supply; Temperature Range: -40°C to 85°C; Package: 32-QFN |
| 中文描述： | 的PS / 2鍵盤射頻接收器 |
| 文件頁數(shù)： | 10/17頁 |
| 文件大?。?/td> | 1084K |
| 代理商： | EKK6111 |
eKK6111
RF KEYBOARD DECODER
Preliminary
Symbol
I/O
Function
P50
I
Connect with data pin of RF receiver module connection
P60
I
Switch DIP for Device ID bit 0 or connect with DO pin of EEPROM
P61
I / O
Switch DIP for Device ID bit 1 or connect with DI pin of EEPROM
P62
I / O
Switch DIP for Device ID bit 2 or connect with SK pin of EEPROM
P63
O
Connect with CS pin of EEPROM
P64
I
Connect with push bottom
P70
O
Caps Lock Indicator
P71
O
NUM Lock Indicator
P72
O
Scroll Lock Indicator
P73
O
RF data receive Indicator
P74
I
CLOCK line for IBM communication, internal pull high
P75
I
DATA line for IBM communication, internal pull high
P76
O
CLOCK line for IBM communication, internal open-drain
P77
O
DATA line for IBM communication, internal open-drain
OSCI
I
Connect with 4.00MHz resonator oscillation
OSCO
O
CLOCK Output
VDD
I
+5V Power supply
VSS
I
Ground
PIN ASSIGNMENT
U1
eKK6111
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TCC
VDD
NC
VSS
/INT
RFI
CHS
RFM
CS
DO/ID0
DI/ID1
SK/ID2
ER
CONN
/RESET
OSCI
OSCO
DATAO
CLKO
DATAI
CLKI
RxLED
SCROLL
NUMS
CAPS
NC
MS
PIN DESCRIPTIONS
FUNCTION DESCRIPTIONS
Decoder Buffer
The decoder will buffer 16 bytes in first-in-first-out order when the system is able to read scan codes from RF
receiver module. The response codes and repeated codes will not be buffered. If receives a multiple-byte sequence, the
entire sequence must fit into the buffer or the key data is discarded and a buffer-overrun condition occurs.
Power-on Reset and self test
The duration of the decoder Power-on-Reset (POR) should be within 150 milliseconds and 2 seconds after the
power is applied to the decoder.
After executing POR, the receiver executes a self test. The LEDs are turned in at the beginning and off at the end
of the self test. The self test takes a minimum 300 milliseconds and a maximum 500 milliseconds. If the self test is
successful, A completion code AA hex is sent to the system and the decoder starts read and decode the data from RF Rx
module. If self test fails, and error code is sent, the decoder is disabled and waits for command from the system. The
completion codes are sent between 450 milliseconds and 2.5 seconds after POR, and between 300 and 500 milliseconds
after RESET command is acknowledged.
* This specification are subject to be changed without notice.
2
2002/11/15
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