xr16m890 Exar Corporation, xr16m890 Datasheet - Page 53

• Manufacturer Part Number: xr16m890
• Description: Uart With 128-byte Fifo And Integrated Level Shifters
• Manufacturer: Exar Corporation

REV. P1.1.1
AC ELECTRICAL CHARACTERISTICS
TA = -40
S
T
T
T
T
T
T
YMBOL
T
T
T
T
T
T
T
T
T
T
T
Bclk
T
T
T
T
T
T
T
T
LLAW
LLAR
WDO
T
MOD
RDV
SSR
CSL
WRI
SRT
RST
LLA
WR
RSI
RRI
SSI
INT
WT
AS
AH
RD
DY
DD
DS
DH
RR
SI
O
TO
Address Setup Time
Address Hold Time
Delay from CS# to LLA#/IOR#/IOW#
LLA# Strobe Width
IOR# Strobe Width
Delay from LLA# to IOR#
Delay from LLA# to IOW#
Read/Write Cycle Delay
Data Access Time
Data Disable Time
IOW# Strobe Width
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 Start 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
+85
O
C, V
CC IS
P
ARAMETER
1.62
TO
3.63V, 70
VLIO Data Bus Read/Write Timing
UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
Modem/Interrupt Timing
P
F
PRELIMINARY
M
LOAD WHERE APPLICABLE
10
10
40
40
10
10
40
1.8V ± 10%
3
0
2
2
3
8
IN
L
53
IMITS
M
40
20
50
50
50
45
45
24
45
45
45
1
1
8
AX
16X or 8X or 4X of data rate
M
10
25
25
10
40
2.5V ± 10%
8
2
0
2
2
8
2
8
IN
L
IMITS
M
20
10
50
50
50
45
45
24
45
45
45
1
1
8
AX
M
10
20
20
10
40
IN
3.3V ± 10%
6
2
0
2
2
6
2
8
L
IMITS
XR16M890
M
15
10
50
50
50
45
45
24
45
45
45
1
1
8
AX
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
ns
NIT