xr16m890 Exar Corporation, xr16m890 Datasheet - Page 52

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

XR16M890
UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
AC ELECTRICAL CHARACTERISTICS
TA = -40
S
XTAL1
T
ECLK
T
T
T
T
YMBOL
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
ECLK
WDH
RWH
ADH
RWS
RDH
WDS
RDV
ADS
RDA
CSD
CSL
WR
AS
AH
CS
RD
DY
DD
DY
DS
DH
O
TO
UART Crystal Frequency
External Clock Frequency
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 (16 Mode)
Address Setup (68 Mode)
Address Hold (68 Mode)
R/W# Setup to CS# (68 Mode)
Data Access Time (68 mode)
Data Disable Time (68 mode)
Write Data Setup (68 mode)
Write Data Hold (68 Mode)
CS# De-asserted to R/W# De-
asserted (68 Mode)
CS# Strobe Width (68 Mode)
CS# Cycle Delay (68 Mode)
+85
O
C, V
CC IS
P
ARAMETER
1.62
68 Mode (Motorola) Data Bus Read/Write Timing
TO
16 Mode (Intel) Data Bus Read/Write Timing
3.63V, 70
PRELIMINARY
P
F
M
LOAD WHERE APPLICABLE
12
90
90
90
90
90
30
15
90
90
1.8V ± 10%
0
0
3
5
0
0
3
3
IN
L
52
IMITS
M
24
40
85
25
85
15
AX
M
60
60
60
60
60
15
10
60
60
2.5V ± 10%
7
0
0
3
0
0
0
3
3
IN
L
IMITS
M
24
64
55
10
55
15
AX
M
35
35
35
35
35
10
10
35
35
3.3V ± 10%
IN
5
0
0
3
0
0
0
3
3
L
IMITS
M
24
96
30
30
15
5
AX
REV. P1.1.1
U
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NIT