Computex FP-40 - 20-Pin 2.54 Mm-Pitch Connector; ① SWD Interface

Technical Information on On-board Flash Programmer FP-40 Aug. 31, 2023 (Second edition)
4
■ 20-pin 2.54mm-pitch connector
Target connector specifications
(Top view on the target board)
Recommended connector
Manufacturer: OMRON Corporation
Model: XG4C-2031
(For detailed dimensions of the connector, refer to the documentation by manufacturer of the connector.)
*Please refer the pin configuration diagram above and make sure that the connector is in the right direction
before connecting.
Please check the pin number in the signal table above and make sure the signal and the pin numbers
match.
① SWD interface
The SWD interface signal table when connected with a 20-pin 2.54mm pitch connector is shown below.
In addition to the standard SWD signals, a power supply function and external input/output functions are supported via
Connectionthe FP-40's unique signals. When using FP-40, refer to "About FP-40 unique signals" below for connection.
Signal description
Pin
No.
SWD I/F FP-40
FP-40 unique
Specifications
Connection
Signal
Input/
Output
*1
Signal
Input/
Output
*1
1
VTref
Output
VTref
Output
-
Connect the I/O power supply of the CPU to be connected.
2
TVDD Output
X3.3V
(N.C.)
Input Yes
TVDD signal is not used in FP-40.
X3.3V is a FP-40 unique signal and can be used as 3.3V
power supply function.
Please note that this signal should not be used if X5V(Pin
20) is used as the power supply.
When not used, leave as NC.
3
N.C. -
EX_BSY
(N.C.)
Input Yes
EX_BSY is a FP-40 unique signal and outputs the operation
status from FP-40.
When not used, leave as NC.
4
GND
-
GND
-
-
5
N.C. -
EX_NG
(N.C.)
Input Yes
EX_NG is an FP-40 original signal and outputs the operation
status from FP-40.
When not used, leave as NC.
6
GND
-
GND
-
-
7
SWDIO
Input/Output
SWDIO
Input/Output
-
8
GND
-
GND
-
-
9
SWCLK
Input
SWCLK
Input
-
10
GND
-
GND
-
-
11
N.C. -
EX_STARTn
(N.C.)
Output Yes
EX_STARTn is a FP-40 unique signal and can be used as a
write start request signal to FP-40.
When not used, leave as NC.
12
GND
-
GND
-
-
13
SWO
Output
N.C.
-
Yes
NC as this signal is not used.
14
GND
-
GND
-
-
15 SRSTn Input SRSTn Input -
Connect the reset signal to the connected CPU with a wired
OR circuit or an OR circuit. The SRSTn signal is an open
collector output.
16
GND -
EX33_BSY
(N.C.)
Input Yes
EX33_BSY is an FP-40 original signal and outputs the
operation status from FP-40.
When not used, leave as NC.
17
N.C. -
EX_OK
(N.C.)
Input Yes
EX_OK is an FP-40 original signal and outputs the operation
status from FP-40.
When not used, leave as NC.
18
GND -
EX33_OK
(N.C.)
Input Yes
EX33_OK is an FP-40 original signal and outputs the
operation status from FP-40.
When not used, leave as NC.
19
N.C. -
EX33_STARTn
(N.C.)
Output Yes
EX33_STARTn is an FP-40 original signal and can be used
as a write start request signal to FP-40.
When not used, leave as NC.
20
GND -
X5V
(N.C.)
Input Yes
X5V is FP-40's unique signal and can be used as 5V power
supply function.
Cannot be used with 2-pin 3.3V power supply. If not used,
leave as NC.
Do not use as a power supply function when connected to
GND.
*1: Input/output is based on the target system.