Table of Contents
Advertisement
R0P7727TH003TRKE General Information Manual
5.3 UART
5.3.1 Block Description
Figure 5.4 shows the UART control block. As shown in Figure 5.4, the UART control block contains the
controller (ST16C2550 from EXAR), RS232C interface driver, and 15-pin connector (CN1). This controller
uses the clock pulses (7.3728MHz) supplied from the power supply controller (H8/3048F-ONE) for operations,
and determines a baud rate (transfer rate) using these pulses as reference.
This controller has been provided with a 2-channel UART device. Channel A is used to communicate with
the power supply controller (H8/3048F-ONE).
connector (CN1), it can be used as a debug interface if it is connected to a PC.
In addition, channel A (INTA) inputs the controller interrupts to the SH7727 PINT6 and channel B (INTB)
inputs them to the SH7727 PNT7. Because the INTA and INTB interrupts are "High active," settings must be
made in such a way that PINT6 and PINT7 interrupt requests can be detected at High level.
refer to the EXAR ST16C2550 Manual.
EXAR Homepage:
SH7727
PINT7
PINT6
http://www.exar.com
UART controller
Address Bus
Data bus
Channel B
Control signal
Channel A
INTB
INTA
Figure 5.4 Serial Interface Block
Because channel B is connected to a 15-pin RS-232C
RS232C
interface driver
Power supply controller
XTAL1
7.3728MHz
OSC2
28
Functional Blocks
16-pin
serial
connector
(CN1)
SCI channel 1
CK
EXTAL
For details,
Advertisement
Table of Contents
