Toshiba H1 Series Data Book page 55

Table 3.4.8 Baud Rate Modification Command
Baud Rate (bps)
Modification Command
Note 1: If f (oscillation frequency) is 10.0 MHz, 57600 and 115200 bps are not supported.
OSCH
Note 2: If f (oscillation frequency) is 6.00, 8.00, or 9.00 MHz, 38400, 57600, and 115200 bps are not
OSCH
supported.
Operation Command
Table 3.4.10 Version Management Information
Version Information
Table 3.4.11 data of measuring frequency
X1-X2 oscillator frequency
(MHz)
(4) Description of the UART boot program operation
The boot program receives a user program sent from the PC via UART and transfers
it to the internal RAM. If the transfer ends normally, the boot program calculates
SUM and sends the result to the PC before executing the user program. The execution
start address is the first address received. The boot program enables users to perform
customized on-board programming.
When UART is used to download a user program, the maximum allowed program
size is 282 Kbytes (3000H – 49800H). (The extended Intel Hex format is supported.)
a) Operation procedure
1. Connect the serial cable. This must be done before the microcontroller is reset.
2. Set the AM1 and AM0 pins to "1" and reset the microcontroller.
3. The receive data in the 1st byte is matching data (5AH). Upon starting in
BOOT mode, the boot program goes to a state in which it waits for matching
data. When matching data is received, the initial baud rate of the serial
channel is automatically set to 9600 bps.
4. The 2nd byte is used to echo back 5AH to the PC upon completion of the
automatic baud rate setting in the 1st byte. If automatic baud rate setting fails,
the boot program stops operation.
5. The 3rd through 6th bytes are used to send the version management
information of the boot program in ASCII code. The PC should check that the
correct version of the boot program is used.
6. The 7th byte is used to send information on the measured frequency. The PC
should check that the frequency of the resonator is measured correctly.
7. The receive data in the 8th byte is baud rate modification data. The five kinds
of baud rate modification data shown in Table 3.4.8 are available. Even when
9600 19200
28H 18H
Table 3.4.9 Operation Command
C0H
FRM1
6.000
09H
92CZ26A-52
38400 57600
07H 06H
Operation
User program start
ASCII Code
46H, 52H, 4DH, 31H
8.000 9.000 10.000
0AH 08H 0BH
TMP92CZ26A
115200
03H