Renesas RTKA788152DE0000BU, Manual

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Evaluation Board Manual
R15UZ0002EU0100 Rev.1.00 Page 1
Oct 6, 2021 © 2021 Renesas Electronics
RTKA788152DE0000BU, the RS-485 evaluation
board, allows you to evaluate the half-duplex
transceivers of the RAA78815x family of RS-485
transceivers.
Specifications
▪ 4.5V to 5.5V Supply Voltage
▪ 115kbps Half-Duplex Transceiver RAA788152
Features
▪ Single 115kbps Half-Duplex Transceiver
▪ RAA788152 (115kbps version currently installed)
can be unsoldered and replaced by RAA788155
(1Mbps version) or RAA788158 (20Mbps version)
▪ Place holders for fail-safe biasing resistors
▪ Configuration jumpers to operate the transceiver as
transmitter or receiver, or as a transmitter with
loopback
Figure 1. Block Diagram
A
B
C
1
2
4
3
5
6
8
7
GND
A/Y
VCC
B/Z
RO
DE
DI
RE
RO
/RE
DE
DI
V
CC
B/Z
A/Y
120 Ω
R
2
V
CC
R
T
GND
SHIELD
B/Z
A/Y
R
3
C
4
DNP 0 Ω
DNP
DNP
LK2
LK3
R
1
U1
A
B
C
D
LK1
V
CC
RO
/RE
DE
DI
VCC
GND
10u
0.1u
0.01u
GND
V
CC
C
3
C
2
C
1
RTKA788152DE0000BU