h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 477
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h8s-2111b
Manufacturer Part Number
h8s-2111b
Description
Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2111B.pdf
(582 pages)
- Current page: 477 of 582
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7. Boot mode can be cleared by a reset. Cancel the reset*
8. Do not change the mode pin input levels in boot mode.
9. All interrupts are disabled during programming or erasing of the flash memory.
Notes: 1. Some parts of this area are reserved only for boot mode and therefore should not be
Table 18.5 Boot Mode Operation
at least 20 states, and then setting the mode pins. Boot mode is also cleared when a WDT
overflow occurs.
Transmits data H'55 when data H'00
2. After reset is cancelled, mode pin input settings must satisfy the mode programming
Transmits number of bytes (N) of
programming control program to be
transferred as 2-byte data (low-order byte
following high-order byte).
Transmits 1-byte of programming control
program (repeated for N times).
Continuously transmits data H'00
Receives data H'AA.
Receives data H'AA.
used for any other purpose.
setup time (t
is received error-free.
at specified bit rate.
Processing Contents
Host Operation
MDS
Boot program
erase error
= 4 states).
Communications Contents
H'00, H'00 . . . H'00
High-order byte and
low-order byte
Echoback
Echoback
H'FF
H'AA
H'AA
H'00
H'55
H'XX
2
after driving the reset pin low, waiting
Checks flash memory data, erases all flash
memory blocks in case of written data
existing, and transmits data H'AA to host.
(If erase could not be done, transmits data
H'FF to host and aborts operation.)
Branches to programming control program
transferred to on-chip RAM and starts
execution.
• Measures low-level period of receive data H'00.
• Calculates bit rate and sets it in BRR of SCI_1.
• Transmits data H'00 to host as adjustment end
Echobacks received data to host and also
transfers it to RAM (repeated for N times).
Branches to boot program at reset-start.
After receiving data H'55, transmits data
H'AA to host.
Echobacks the 2-byte data received to host.
indication.
Rev. 1.00, 05/04, page 443 of 544
Boot program start
Processing Contents
LSI Operation
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