Emerson Process Management ControlWave XFC User Manual
Page 22
1-8 / Introduction
CI-ControlWave XFC
Basic CPU components and features are summarized as follows:
• LH7A400 System-on-Chip 32-bit ARM9TDMI RISC Core microprocessor
• 512KB FLASH Boot/Downloader, 29LV040B, 90 nS, 8-bit access
• 2MB SRAM, 3.3V, 1024K x 16, 17nsec., with Battery Back-up
• 8MB simultaneous read/write FLASH, TSOP site
• 3 serial Comm. ports
• SPI I/O Bus Interface, three separate chip selects
• Spread Spectrum clock for lower EMI
• Serial Real Time Clock with battery backup
• 10-Position general-purpose switch bank
• Coin cell socket accepts a 3.0V, 300mA-hr lithium battery
• Display
Module
1.3.3.1 CPU Board Connector P2
CPU Board connector P2 provides the interface to connector J7 on the XFC I/O Board (see
Table 1-1).
Table 1-1 - CPU Board Connector P2 - I/O Intf Signals (Pins 24 & 25 are not used)
I/O
# Pins
Signal Name
Description
I/O 1 GND
Power
Ground
O
2
VCC1.8
1.8 Volt Power
I
3
VCC3
3.3 Volt Power
O 4
IORSTB#.
I/O
Reset
I 5
POWERGOOD
Power
Good
I 6
PFDLYCLK#
PFDLYCLK#
I 7
PWRFAIL#
PWRFAIL#I
I 8
VIN100M
VIN100M
O 9
SPI_CK
SPI
Clock
I
10
SPI_MISO
SPI Master In / Slave Out
O
11
SPI_MISI
SPI Master Out / Slave In
O
12
SPI_IO_CS#
SPI Chip Enable for I/O Board
O 13
232
TXD2
COM1
I 14
232
RXD2
COM1
I 15
232
DCD3
COM2
I 16
232
RXD3
COM2
O 17
232
RTS3
COM2
O 18
232
TXD3
COM2
I 19
232
CTS3
COM2
O 20
232
DTR3
COM2
I/O 21 TR+
485
COM3
I/O 22 TR-
485
COM3
O
23
IO_CS#
Spare Chip Select
I/O 26 GND
Power
Ground
CPU Board Serial Comm. Port Connectors (see Section 1.5.5)
The CPU Module supports up to three serial communication ports (COM1, COM2 &
COM3). COM1 provides a 3-wire half duplex RS-232 interface and is referenced on the
Terminal Plate as the Local Port. COM1 operates by sencing RS-232 levels on the TX or RX
terminals. COM2 provides a 7-wire RS-232 interface and supports half/full duplex
operation. When the ControlWave XFC has been configured for Auto DTR Mode, the DCD
signal must be high before COM2 becomes operational. COM3 supports RS-485