Nxp Semiconductors UM10237 ユーザーズマニュアル
UM10237_2
© NXP B.V. 2008. All rights reserved.
User manual
Rev. 02 — 19 December 2008
684 of 792
NXP Semiconductors
UM10237
Chapter 30: LPC24XX Flash memory programming firmware
9.1 Unlock <Unlock code>
9.2 Set Baud Rate <Baud Rate> <stop bit>
[1]
ISP entry after reset uses the on chip IRC and PLL to run the device at CCLK = 14.748 MHz
Read Part ID
J
Read Boot code version
K
Compare
M <address1> <address2> <number of bytes>
Table 604. ISP command summary
ISP Command
Usage
Described in
Table 605. ISP Unlock command
Command
U
Input
Unlock code: 23130
10
Return Code
CMD_SUCCESS |
INVALID_CODE |
PARAM_ERROR
Description
This command is used to unlock Flash Write, Erase, and Go commands.
Example
"U 23130<CR><LF>" unlocks the Flash Write/Erase & Go commands.
Table 606. ISP Set Baud Rate command
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.
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 607. Correlation between possible ISP baudrates and CCLK frequency (in MHz)
ISP Baudrate .vs.
CCLK Frequency
CCLK 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
+
+
+