tmp1940cyaf TOSHIBA Semiconductor CORPORATION, tmp1940cyaf Datasheet - Page 392

• Manufacturer Part Number: tmp1940cyaf
• Description: 32-bit Tx System Risc Tx19 Family
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Note 1: In I/O Interface mode, the baud rate for the transfers of the first and second bytes must be 1/16 of the desired baud
Note 2: In case of any negative acknowledge, the boot program returns to a state in which it waits for a command code (3rd
Note 3: The 19th to 25th bytes must be within the RAM address range 0xFFFF_8000–0xFFFF_8FFFF.
Boot ROM
RAM
rate.
byte). In I/O Interface mode, if a communication error occurs, a negative acknowledge does not occur.
1st byte
2nd byte
3rd byte
4th byte
5th byte
thru
16th byte
17th byte
18th byte
19th byte
20th byte
21st byte
22nd byte
23rd byte
24th byte
25th byte
26th byte
27th byte
thru
mth byte
(m + 1)th byte
(m + 2)th byte
(m + 3)th byte
Byte
Table 3.6 Transfer Format for the RAM Transfer Command
Controller to the TMP1940FDBF
Serial operation mode and baud rate
For UART mode
For I/O Interface mode
Command code
Password sequence (12 bytes)
(0x0000_03F4 thru 0x0000_03FF)
Checksum value for bytes 5–16
RAM storage start address (bits 31–24)
RAM storage start address (bits 23–16)
RAM storage start address (bits 15–8)
RAM storage start address (bits 7–0)
RAM storage byte count (bits 15–8)
RAM storage byte count (bits 7–0)
Checksum value for bytes 19–24
RAM storage data
Checksum value for bytes 27–m
Data Transferred from the
TMP1940FDBF-34
(10H)
86H
30H
Desired baud
rate (Note 1)
Baud Rate
ACK for the serial operation mode byte
ACK for the command code byte (Note 2)
ACK for the checksum byte (Note 2)
ACK for the checksum byte (Note 2)
ACK for the checksum byte (Note 2)
Jump to RAM storage start address
For UART mode
For I/O Interface mode
Normal acknowledge
Negative acknowledge
Communication error
Normal acknowledge
Negative acknowledge
Communication error
Normal acknowledge
Negative acknowledge
Communication error
Normal acknowledge
Non-acknowledge
Communications error
Normal acknowledge
Normal acknowledge
TMP1940FDBF to the Controller
(The boot program aborts if the baud rate
is can not be set correctly.)
Data Transferred from the
TMP1940FDBF
86H
30H
10H
x1H
x8H
10H
11H
18H
10H
11H
18H
10H
11H
18H