NXP Semiconductors
SC28L92
3.3 V/5.0 V Dual Universal Asynchronous Receiver/Transmitter
Table 2.
Symbol
TxDA
TxDB
OP0
OP1
OP2
OP3
OP4
OP5
OP6
OP7
IP0
IP1
IP2
IP3
IP4
IP5
IP6
VCC
Pin description for 80xxx bus interface (Intel) …continued
Pin
Type Description
PLCC44 QFP44 HVQFN48
33
28
30
O Channel A transmitter serial data output: The least significant bit is
transmitted first. This output is held in the Mark condition when the
transmitter is disabled, Idle or when operating in local loopback mode.
See note on drive levels at block diagram (Figure 1).
13
6
8
O Channel B transmitter serial data output: The least significant bit is
transmitted first. This output is held in the Mark condition when the
transmitter is disabled, Idle, or when operating in local loopback mode.
See note on drive levels at block diagram (Figure 1).
32
27
29
O Output 0: General purpose output or channel A request to send
(RTSAN, active LOW). Can be deactivated automatically on receive or
transmit.
14
7
9
O Output 1: General-purpose output or channel B request to send
(RTSBN, active LOW). Can be deactivated automatically on receive or
transmit.
31
26
28
O
Output 2: General purpose output, or channel A transmitter 1× or 16×
clock output, or channel A receiver 1× clock output.
15
8
10
O Output 3: General purpose output or open-drain, active LOW
counter/timer output or channel B transmitter 1× clock output, or
channel B receiver 1× clock output.
30
25
27
O Output 4: General purpose output or channel A open-drain, active
LOW, RxA interrupt ISR[1] output.
16
9
11
O Output 5: General-purpose output or channel B open-drain, active
LOW, RxB interrupt ISR[5] output.
29
24
26
O Output 6: General purpose output or channel A open-drain, active
LOW, TxA interrupt ISR[0] output.
17
10
12
O Output 7: General-purpose output, or channel B open-drain, active
LOW, TxB interrupt ISR[4] output.
8
2
2
I
Input 0: General purpose input or channel A clear to send active LOW
input (CTSAN).
5
43
47
I
Input 1: General purpose input or channel B clear to send active LOW
input (CTSBN).
40
34
38
I
Input 2: General-purpose input or counter/timer external clock input.
3
41
45
I
Input 3: General purpose input or channel A transmitter external clock
input (TxCA). When the external clock is used by the transmitter, the
transmitted data is clocked on the falling edge of the clock.
43
37
41
I
Input 4: General purpose input or channel A receiver external clock
input (RxCA). When the external clock is used by the receiver, the
received data is sampled on the rising edge of the clock.
42
36
40
I
Input 5: General purpose input or channel B transmitter external clock
input (TxCB). When the external clock is used by the transmitter, the
transmitted data is clocked on the falling edge of the clock.
41
35
39
I
Input 6: General purpose input or channel B receiver external clock
input (RxCB). When the external clock is used by the receiver, the
received data is sampled on the rising edge of the clock.
44
38, 39 42
Pwr Power Supply: 3.3 V ± 10 % or 5 V ± 10 % supply input.
SC28L92_7
Product data sheet
Rev. 07 — 19 December 2007
© NXP B.V. 2007. All rights reserved.
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