Philips LPC2129 - Page 271

Flash Memory System and Programming 271 May 03, 2004
Philips Semiconductors Preliminary User Manual
LPC2119/2129/2194/2292/2294ARM-based Microcontroller
Set Baud Rate <Baud Rate> <stop bit>
Echo <setting>
Table 200: ISP Set Baud Rate command description
Command B
Input
Baud Rate: 9600 | 19200 | 38400 | 57600 | 115200 | 230400
Stop bit: 1 | 2
Return Code
CMD_SUCCESS |
INVALID_BAUD_RATE |
INVALID_STOP_BIT |
PARAM_ERROR
Description
This command is used to change the baud rate. The new baud rate is effective after the command
handler sends the CMD_SUCCESS return code.
Example "B 57600 1<CR><LF>" sets the serial port to baud rate 57600 bps and 1 stop bit.
Table 201: Correlation between possible ISP baudrates and external crystal frequency (in MHz)
ISP Baudrate
.vs.
External Crystal Frequency
9600 19200 38400 57600 115200 230400
10.0000 +++
11.0592 + + +
12.2880 +++
14.7456 ++++++
15.3600 +
18.4320 + + +
19.6608 +++
24.5760 +++
25.0000 +++
Table 202: ISP Echo command description
Command A
Input Setting: ON=1 | OFF=0
Return Code
CMD_SUCCESS |
PARAM_ERROR
Description
The default setting for echo command is ON. When ON the ISP command handler sends the
received serial data back to the host.
Example "A 0<CR><LF>" turns echo off.