User's Manual
Date: 2010/02/04
Version: 1.0
Status: Released
10/22 ACM8068 HW Application Manual V1.0 ©Copyright 2010, AMOD Technology
4. Interfaces
4.1 UARTInterface
4.1.1 UARTinterfacecharacteristicandpinoutdescription
ACM8068 has two UARTs. UART0 is used to communicate with host systems, and
to download the memory FLASH. The interface configuration is described as follow
tables:
Table 2: UART Data configuration
Description Configurations
Baud rate 115,200
Data bits 8 bits
Stop bit 1
Parity check Non
HW flow control Non
Table 3: UART0 pin out description
UART0 Connector Pin Description
RXD0 3 Receive Data
TXD0 4 Transmit Data
DCD0 42 Data Carrier Detected
DSR0 43 Data Set Ready
RTS0 44 Clear to Send
CTS0 45 Request To Send
RI0 11 Ring Indication
Table 4: UART1 pin out connector
UART1 Connector Pin Description
RXD1 1 Receive Data
TXD1 2 Transmit Data
Table 5: Electrical characteristics
ITEM Description UART0 interface (UART1 for system)
MIN MAX
Vil Low level voltage input (0.3 x
VDD_IO_HIGH)
0.87V
Vih high level voltage input (0.7 x VDD_IO_HIGH)
2.03V
Vol Low level voltage Output 0.4 V
Voh High level voltage output
(VDD_IO_HIGH-0.4V)
2.5V