Symbol SE 2223, Руководство по интеграции

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2-5
Installation
RTS*
PWRDWN
BPR*
DLED*
7
8
9
10
O
O
O
O
Request to Send: Serial port handshaking line.
Power Down Ready : When high, the decoder is in low power
mode.
Beeper*: Low current beeper output.
Decode LED: Low current decode LED output.
Min. Max. Condition
V
OL
0.45 I
OL
= 1.6mA
V
OH
2.40 I
OH
= -1.6mA, V
CC
=4.5V
4.0 I
OH
= -250µA@V
CC
=4.5V
TXD 5 O Transmitted Data : Serial output port.
Min. Max. Condition
V
OL
0.45 I
OL
= 1.6mA
V
OH
2.40 I
OH
= -1.6mA, V
CC
=4.5V
4.0 I
OH
= -250µA@V
CC
=4.5V
Table 2-2. Electrical Interface (Continued)
Mnemonic No. Type Name and Function
Signal names with the “*” modifier are asserted when at the ground level (active low). Signal names
without the “*” modifier are asserted when at the positive supply voltage level (active high).
V
CC
OUTPUT
10k
i
OUTPUT
i