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M38B71M1 Datasheet(PDF) 91 Page - Renesas Technology Corp

Part No. M38B71M1
Description  SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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Maker  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
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M38B71M1 Datasheet(HTML) 91 Page - Renesas Technology Corp

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90
38B7 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
q Program command
Input command code 4016 in the first transfer. Proceed and input
the low-order 8 bits and the high-order 8 bits of the address and
then program data. Programming is initiated at the last rising edge
of the serial clock during program data transfer. The BUSY pin is
driven high during program operation. Programming is completed
within 10
µs as measured by the internal timer, and the BUSY pin
is pulled low.
Note : A programming operation is not completed by executing the
program command once. Always be sure to execute a pro-
gram verify command after executing the program command.
When the failure is found in the verification, the user must re-
peatedly execute the program command until the pass in the
verification. Refer to Figure 90 for the programming flowchart.
q Program verify command
Input command code C016 in the first transfer. Proceed and drive
__
the OE pin low. When this is done, The M38B79FF verify-reads
the programmed address’s contents, and then latchs it into the in-
__
ternal data latch. When the OE pin is released back high and se-
rial clock is input to the SCLK pin, the verify data that has been
latched into the data latch is serially output from the SDA pin.
Fig. 94 Timings during program verify
Fig. 93 Timings during programming
SCLK
BUSY
OE
SDA
tCH
A0
00000010
A7
A8
A15
D0
D7
tCH
tCH
tPC
Command code input (4016)
Program address input (L)
Program address input (H)
Program data input
tWP
Program
SCLK
BUSY
OE
SDA
D0
D7
tCRPV
Command code input (C016)
Verify data output
tWR
Verify read
tRC
Note: When outputting the verify data, the SDA pin is switched for output at the first falling edge of SCLK. The SDA pin is placed
in the floating state during the period of th(C-E) after the last rising edge of SCLK (at the 8th bit).
00000011
“L”


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