User's Manual

TOBY-R2 series - System Integration Manual
UBX-16010572 - R04 System description
Page 13 of 147
Function
Pin Name
Pin No
I/O
Description
Remarks
SIM
VSIM
59
O
SIM supply output
VSIM = 1.8 V / 3 V output as per the connected SIM type.
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
SIM_IO
57
I/O
SIM data
Data input/output for 1.8 V / 3 V SIM
Internal 4.7 k pull-up to VSIM.
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
SIM_CLK
56
O
SIM clock
3.25 MHz clock output for 1.8 V / 3 V SIM
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
SIM_RST
58
O
SIM reset
Reset output for 1.8 V / 3 V SIM
See section 1.8 for functional description.
See section 2.5 for external circuit design-in.
UART
RXD
17
O
UART data output
1.8 V output, Circuit 104 (RXD) in ITU-T V.24,
for AT commands, data communication, FOAT, FW update
by u-blox EasyFlash tool and diagnostic.
Test-Point and series 0  for diagnostic access recommended.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
TXD
16
I
UART data input
1.8 V input, Circuit 103 (TXD) in ITU-T V.24,
for AT commands, data communication, FOAT, FW update
by u-blox EasyFlash tool and diagnostic.
Internal active pull-up to V_INT.
Test-Point and series 0  for diagnostic access recommended.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
CTS
15
O
UART clear to send
output
1.8 V output, Circuit 106 (CTS) in ITU-T V.24.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
RTS
14
I
UART ready to send
input
1.8 V input, Circuit 105 (RTS) in ITU-T V.24.
Internal active pull-up to V_INT.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
DSR
10
O
UART data set ready
output
1.8 V, Circuit 107 in ITU-T V.24.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
RI
11
O
UART ring indicator
output
1.8 V, Circuit 125 in ITU-T V.24.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
DTR
13
I
UART data terminal
ready input
1.8 V, Circuit 108/2 in ITU-T V.24.
Internal active pull-up to V_INT.
Test-Point and series 0  for diagnostic access recommended.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.
DCD
12
O
UART data carrier
detect output
1.8 V, Circuit 109 in ITU-T V.24.
Test-Point and series 0  for diagnostic access recommended.
See section 1.9.1 for functional description.
See section 2.6.1 for external circuit design-in.