xr16m2550 Exar Corporation, xr16m2550 Datasheet - Page 37

• Manufacturer Part Number: xr16m2550
• Description: High Performance Low Voltage Duart With 16-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.2
AC ELECTRICAL CHARACTERISTICS
Unless otherwise noted: TA=-40
S
XTAL1
T
ECLK
T
T
YMBOL
T
T
T
T
T
T
T
T
T
T
T
Bclk
T
T
T
T
T
T
T
T
T
T
ECLK
WDO
MOD
T
RDV
SSR
SRT
RST
WRI
WR
RSI
RRI
AH
SSI
INT
WT
AS
CS
RD
DY
DD
DY
DS
DH
RR
SI
UART Crystal Oscillator
External Clock
External Clock Time Period
Address Setup Time
Address Hold Time
Chip Select Width
IOR# Strobe Width
Read Cycle Delay
Data Access Time
Data Disable Time
IOW# Strobe Width
Write Cycle Delay
Data Setup Time
Data Hold Time
Delay From IOW# To Output
Delay To Set Interrupt From MODEM Input
Delay To Reset Interrupt From IOR#
Delay From Stop To Set Interrupt
Delay From IOR# To Reset Interrupt
Delay From Stop To Interrupt
Delay From Initial INT Reset To Transmit Start
Delay From IOW# To Reset Interrupt
Delay From Stop To Set RXRDY#
Delay From IOR# To Reset RXRDY#
Delay From IOW# To Set TXRDY#
Delay From Center of Start To Reset TXRDY#
Reset Pulse Width
Baud Clock
P
ARAMETER
o
to +85
HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO
o
C, Vcc=1.62 - 3.63V, 70 pF load where applicable
37
M
1.8V ± 10%
15
65
65
65
65
65
20
40
IN
0
0
3
8
L
IMITS
M
24
32
60
25
50
50
50
45
45
24
45
45
45
16X or 8X or 4X of data rate
1
1
8
AX
M
2.5V ± 10%
10
40
40
40
40
40
10
40
IN
0
0
3
8
L
IMITS
M
24
50
35
25
50
50
50
45
45
24
45
45
45
1
1
8
AX
M
3.3V ± 10%
35
35
35
35
35
10
40
IN
7
0
0
3
8
L
IMITS
XR16M2550
M
24
64
30
25
50
50
50
45
45
24
45
45
45
1
1
8
AX
MHz
MHz
U
Bclk
Bclk
Bclk
Bclk
Hz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NIT