SC28L92A1A NXP Semiconductors, SC28L92A1A Datasheet - Page 11

• Manufacturer Part Number: SC28L92A1A
• Description: UART, DUAL, 3.3V OR 5V, SMD, 28L92
• Manufacturer: NXP Semiconductors

Specifications of SC28L92A1A

• No. Of Channels: 2
• Supply Voltage Range: 2.97V To 3.63V, 4.5V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: PLCC
• No. Of Pins: 44
• Svhc: No SVHC (18-Jun-2010)
• Operating: RoHS Compliant
• Data Rate: 230.4Kilobaud
• Uart Features: Programmable Channel Mode, Line Break Detection & Generation
• Rohs Compliant: Yes

NXP Semiconductors
Table 2.
[1]
Table 3.
SC28L92_7
Product data sheet
Symbol
GND
n.c.
Symbol
I/M
D0
D1
D2
D3
D4
D5
D6
D7
CEN
R/WN
IACKN
DACKN
A0
A1
A2
A3
RESETN 38
HVQFN48 package die supply ground is connected to both GND pin and exposed center pad. GND pin must be connected to supply
ground for proper device operation. For enhanced thermal, electrical, and board level performance, the exposed pad needs to be
soldered to the board using a corresponding thermal pad on the board and for proper heat conduction through the board, thermal vias
need to be incorporated in the PCB in the thermal pad region.
Pin
PLCC44 QFP44 HVQFN48
22
1, 23, 34 23
Pin
PLCC44 QFP44 HVQFN48
12
28
18
27
19
26
20
25
21
39
9
41
10
2
4
6
7
Pin description for 80xxx bus interface (Intel)
Pin description for 68xxx bus interface (Motorola)
16, 17
11
22
12
21
13
20
14
19
15
33
3
35
4
40
42
44
1
32
18
6, 13, 24, 25,
36, 37, 43
7
23
14
22
15
21
16
20
17
35
3
39
4
44
46
48
1
34
[1]
Type
Pwr
Pwr
Type
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I
I
O
I
I
I
I
I
Rev. 07 — 19 December 2007
3.3 V/5.0 V Dual Universal Asynchronous Receiver/Transmitter
Description
Ground
Not connected
Description
Bus configuration: When LOW configures the bus interface to the
conditions shown in this table.
Data bus: Bidirectional 3-state data bus used to transfer commands,
data and status between the DUART and the CPU. D0 is the least
significant bit.
Chip enable: Active LOW input signal. When LOW, data transfers
between the CPU and the DUART are enabled on D0 to D7 as
controlled by the R/WN and A0 to A3 inputs. When HIGH, places the
D0 to D7 lines in the 3-state condition.
Read/Write: Input signal. When CEN is LOW, R/WN HIGH input
indicates a read cycle; when LOW indicates a write cycle.
Interrupt acknowledge: Active LOW input indicating an interrupt
acknowledge cycle. Usually asserted by the CPU in response to an
interrupt request. When asserted places the interrupt vector on the
bus and asserts DACKN.
Data transfer acknowledge: A3-state active LOW output asserted in
a write, read, or interrupt acknowledge cycle to indicate proper
transfer of data between the CPU and the DUART.
Address inputs: Select the DUART internal registers and ports for
read/write operations.
Reset: A LOW level clears internal registers (SRA, SRB, IMR, ISR,
OPR, OPCR), puts OP0 to OP7 in the HIGH state, stops the
counter/timer, and puts channels A and B in the inactive state, with the
TxDA and TxDB outputs in the mark (HIGH) state. Sets MR pointer to
MR1. See
…continued
Figure
10.
SC28L92
© NXP B.V. 2007. All rights reserved.
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