Computex FP-40 - Uart; Target Interface Specifications When Using UART on the FP-40 Unit; Specifications of the Target Connector

Technical Information on On-board Flash Programmer FP-40 Aug. 31, 2023 (Second edition)
18
UART
A dedicated cable is not provided to use UART.
Refer to the interface specifications below to connect to the target.
■ Target interface specifications when using UART on the FP-40 unit
This section describes the interface specifications on the FP-40 unit for connecting the FP-40 to a UART on the target on the.
Specifications of the target connector
Pin allocation
No. Signal
*1
Input/
Output
*2
FP-40 internal circuit
access point
20-pin 2.54mm-pitch
1
VTref
Output
4KΩPull-Down
1
2 X3.3V Input
Power supply
(when output is permitted)
2
3
N.C.
Input
22Ωseries
3
4
GND
GND
4,6,8,10,12,14
5
N.C.
Input
22Ωseries
5
6
GND
GND
4,6,8,10,12,14
7 TXD Input
22Ωseries
10KΩPull-Up (VTref)
7
8
GND
GND
4,6,8,10,12,14
9
RXD
Output
22Ωseries
9
10
GND
GND
4,6,8,10,12,14
11 N.C. Output
1KΩseries
10KΩPull-Up (VTref)
11
12
GND
GND
4,6,8,10,12,14
13 N.C. Output
22Ωseries
10KΩPull-Up (VTref)
13
14
GND
GND
4,6,8,10,12,14
15 SRSTn Input
100Ωseries
Open-collector output
15
16
(EX33_BSY)
Input
100Ωseries
16
17
(EX_OK)
Input
22Ωseries
17
18
(EX33_OK)
Input
100Ωseries
18
19 (EX33_STARTn) Output
1KΩseries
10KΩPull-Up (3.3V)
19
20 (X5V) Input
Power supply
(when output is permitted)
20
*1 : Signal names in parentheses ( ) are signals with FP-40's unique specifications.
*2 : Input/Output is based on the target system.
Target system side
FP-40 side
Connector
FP-40 side view
Connecto to
FP-40
Target cable
FP-40