M34282E2GP MITSUBISHI [Mitsubishi Electric Semiconductor], M34282E2GP Datasheet - Page 62

• Manufacturer Part Number: M34282E2GP
• Description: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

(2) Functional outline
Fig. 29 Timing at reading
62
Table 11 Software command
(3) Read
Number of transfer
Read
Program
Program verify
Number of transfer
Read
Program
Program verify
SCLK
SDA
PGM
Note: When outputting the read data, the SDA pin is switched for output at the first falling of the serial clock. The SDA pin is
In the PROM mode, data is transferred with the clock-
synchronous serial input/output. The input data is read through
the SDA pin into the internal circuit synchronously with the
rising edge of the serial clock pulse. The output data is output
from the SDA pin synchronously with the falling edge of the
serial clock pulse. Data is transferred in units of 8 bits.
Input the command code 15
and input the low-order 8 bits and the high-order 8 bits of the
address and pull the PGM pin to “L.” When this is done, the
contents of input address is read and stored into the internal
data latch.
Command
Command
placed in the high-impedance state during the th
Command code input (15
1 0 1 0 1 0 0 0
First command
Program data H (input)
Program data H (input)
Read data H (output)
code input
15
25
35
16
t
16
16
16
CH
16
)
Fifth
in the first transfer. Proceed
A0
Read address input (L)
Program address L (input)
Program address L (input)
Read address L (input)
A7
t
CH
Second
A8A9
Read address input (H)
Verify data L (output)
A10
(C–E)
0 0 0 0 0
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ELECTRIC
period after the last rising edge of the serial clock (at the 16th bit).
Sixth
t
CR
In the first transfer, the command code is input. Then, address
input or data input/output is performed according to the
contents of the command code. Table 11 shows the software
command used in the PROM mode. The following explains
each software command.
When the PGM pin is released back to “H” and serial clock is
input to the SCLK pin, the low-order 8 bits and high-order 8
bits of read data which have been stored into the data latch,
are serially output from the SDA pin.
Program address H (input)
Program address H (input)
Read address H (input)
t
WR
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
t
RC
D0
Third
Verify data H (output)
Read data output (L)
MITSUBISHI MICROCOMPUTERS
Seventh
D7
Read
t
CH
D8
Program data L (input)
Program data L (input)
Read data output (H)
Read data L (output)
0 0 0 0 0 0 0
4282 Group
Fourth