ST16C554DCQ-0A-EB Exar Corporation, ST16C554DCQ-0A-EB Datasheet - Page 5

• Manufacturer Part Number: ST16C554DCQ-0A-EB
• Description: EVAL BOARD FOR ST16C554D 64TQFP
• Manufacturer: Exar Corporation

Specifications of ST16C554DCQ-0A-EB

• Interface Type: UART
• Data Bus Width: 8 bit
• For Use With/related Products: ST16C554D
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pin Description
REV. 4.0.1
Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.
ANCILLARY SIGNALS
(RESET#)
DTRA#
DTRB#
DTRC#
DTRD#
DSRA#
DSRB#
DSRC#
DSRD#
RESET
XTAL1
XTAL2
16/68#
CDC#
CDD#
CDA#
CDB#
N
RIA#
RIB#
RIC#
RID#
GND
VCC
N.C.
AME
4, 21, 35,
64-LQFP
14, 28,
45, 61
P
15
34
46
17
32
48
64
18
31
49
63
19
30
50
25
26
27
52
IN
3
1
-
-
#
68-PLCC
6, 23, 40,
13, 30,
47, 64
P
12
24
46
58
10
26
44
60
27
43
61
28
42
62
35
36
31
37
57
IN
9
8
-
#
T
Pwr 2.97V to 5.5V power supply.
Pwr Power supply common, ground.
YPE
O
O
I
I
I
I
I
I
UART channels A-D Data-Terminal-Ready (active low) or general purpose out-
put. If these outputs are not used, leave them unconnected.
UART channels A-D Data-Set-Ready (active low) or general purpose input. This
input should be connected to VCC when not used. This input has no effect on
the UART.
UART channels A-D Carrier-Detect (active low) or general purpose input. This
input should be connected to VCC when not used. This input has no effect on
the UART.
UART channels A-D Ring-Indicator (active low) or general purpose input. This
input should be connected to VCC when not used. This input has no effect on
the UART.
Crystal or external clock input.
Crystal or buffered clock output.
Intel or Motorola Bus Select (input with internal pull-up).
When 16/68# pin is HIGH, 16 or Intel Mode, the device will operate in the Intel
bus type of interface.
When 16/68# pin is LOW, 68 or Motorola mode, the device will operate in the
Motorola bus type of interface.
Motorola bus interface is not available on the 64 pin package.
When 16/68# pin is HIGH for Intel bus interface, this input becomes the Reset
pin (active high). In this case, a 40 ns minimum HIGH pulse on this pin will
reset the internal registers and all outputs. The UART transmitter output will be
held HIGH, the receiver input will be ignored and outputs are reset during reset
period
input becomes Reset# pin (active low). This pin functions similarly, but instead
of a HIGH pulse, a 40 ns minimum LOW pulse will reset the internal registers
and outputs.
Motorola bus interface is not available on the 64 pin package.
No Connection. These pins are not used in either the Intel or Motorola bus
modes.
(Table
13). When 16/68# pin is at LOW for Motorola bus interface, this
5
2.97V TO 5.5V QUAD UART WITH 16-BYTE FIFO
D
ESCRIPTION
ST16C554/554D