SimCom SIM8905A User Manual page 23

Output voltage
Output voltage error
Output current
Output switch to ground
Output noise
PSRR- Power supply
rejection ratio
Output capacitor value
［2］
USIM Interface
SIM8905A supports dual cards dual standby, and card presence detection.
Note: The standard software provided by SIMCom only supports single USIM1 card configuration.
Table 14: USIM interface pin definitions
Pin Name
USIM2_DET
USIM2_RST
USIM2_CLK
USIM2_DAT
USIM2_VDD
USIM1_DET
USIM1_RST
USIM1_CLK
USIM1_DAT
USIM1_VDD
No load
No load
2 microphone loads of 1.0 to 1.5 mA each
On resistance
Sink current
0.1 µF bypass
at 20 Hz
at 200 Hz to 1 kHz
at 5 kHz
at 10 kHz
at 20 kHz
External bypass mode［1］
Pin# Type
17 I USIM2 presence detection
18 O USIM2 reset
19 O USIM2 clock
20 I/O USIM2 data
21 P LDO 15 output for USIM2, 1.8V/2.95V
22 I USIM1 presence detection
23 O USIM1 reset
24 O USIM1 clock
25 I/O USIM1 data
26 P LDO 14 output for USIM1, 1.8V/2.95V
Smart Machine Smart Decision
1.60
-3.00
2.0
-
2.0
0.0
80
80
80
80
75
0.1
Description
23
- 2.85 V
0.00 3.00 %
3.0 - mA
Ω
- 20
- - mA
2.0 4.0 µVrms
- - dB
- - dB
- - dB
- - dB
- - dB
0.1 0.5 µF