Technical information

Application Interface Specifications
56 G24-L Module Hardware Description November 15, 2008
UART:
21 TXD_N UART1 TXD I L 100K
PU
V
IH
V
IL
V
OH
V
OL
I
OUT
< 4 mA
2.0
2.6
2.8
0
2.8
0
3.0
0.3
0.3
V
11 RXD_N UART1 RXD O L
9 RTS_N UART1 RTS I L 100K
PU
15 CTS_N UART1 CTS O L
19 DTR_N UART1 DTR I L 100K
PU
13 DSR_N UART1 DSR O L
17 DCD_N UART1 DCD O L
23 RI_N UART1 RI O L
USB:
10
USB_VBUS
USB bus
power
IH V
IH
V
IL
NOTE 1
4.5 5.0
0
5.25
0.2
V
12 USB_DP USB bus
serial data
I/O H V
IH
V
IL
V
OH
V
OL
3.0
3.0
3.3
0
3.3
0
3.6
0.8
0.3
V
14 USB_DN USB bus
serial data
I/O L
SIM Card:
50
SIM_PD_N
SIM presence
detect
I L 100K
PU
V
IH
V
IL
NOTE 2
2.0 2.8
0
3.0
0.3
V
48 SIM_VCC SIM supply O H V
OH
2.7
1.65
2.85
1.8
2.95
1.95
V
44
SIM_RST_
N
SIM reset O L
V
OH
V
OL
SIM_
VCC
00.4
V
52 SIM_DIO SIM serial
data
I/O H 5.1K PU
46 SIM_CLK SIM clock O H
Table 3-3: Interface Specifications (Cont.)
Pin #
Signal
Name
Description I/O
Active
H/L
Internal
PU/PD
Parameter Conditions
Level
Min Typ Max Units