si2439-a-gm Silicon Laboratories, si2439-a-gm Datasheet - Page 8

• Manufacturer Part Number: si2439-a-gm
• Description: V.92 And V.34 Isomodem With Global Daa
• Manufacturer: Silicon Laboratories

Si2494/39
Table 5. Switching Characteristics
(V
8
Parameter
UART Timing Parameters
CLKOUT Output Clock Frequency
Baud Rate Accuracy
Reset Timing Parameters
RESET to RESET
RESET to 1st AT Command
Parallel Timing Parameters
Address Setup
Address Hold
WR Low Pulse Width
Write Data Setup Time
Write Cycle Time
Chip Select Setup
Chip Select Hold
RD Low Pulse Width
RD Low to Data Driven Time
Data Hold
RD High to Hi-Z Time
Read Cycle Time
Write to Read Cycle Time
Serial Peripheral Interface (SPI) Timing Parameters
SS Falling to First SCLK Edge
Last SCLK Edge to SS Rising
SS Rising to MISO High-Z
SCLK High Time
SCLK Low Time
MOSI Valid to SCLK Sample Edge
SCLK Sample Edge to MOSI Change
SCLK Shift Edge to MISO Change
Notes:
D
= 3.0 to 3.6 V, T
1. All timing is referenced to the 50% level of the waveform. Input test levels are V
2. With 32.768 kHz clocking, allow 500 to the reset low-to-high minimum pulse on power-up and wake-from-power-down
conditions.
A
= 0 to 70 °C for F-grade, T
1
A
=
–40 to 85 °C for G-grade)
Symbol
t
t
WDSU
t
t
t
t
t
RLDD
t
t
t
WRC
t
t
t
t
t
t
CSS
CSH
t
t
t
t
CKH
SOH
t
t
t
t
SDZ
CKL
WC
SIS
SIH
WL
DH
RC
BD
RS
AS
AH
RL
DZ
SE
SD
AT
Rev. 1.0
2.048
5.0
Min
300
120
120
120
102
102
–1
15
50
20
10
50
10
41
41
41
41
—
—
—
—
0
0
2
IH
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
= V
D
– 0.4 V, V
49.152
Max
IL
20
30
93
93
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1
= 0.4 V.
Unit
MHz
ms
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%