MITSUBISHI MICROCOMPUTERS
4280 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS
(4) Program
and pull the PGM pin to “L.” When this is done, the program
Input command code 2516 in the first transfer. Proceed and
input the low-order 8 bits and high-order 8 bits of the address
and the low-order 8 bits and high-order 8 bits of program data,
data is programmed to the specified address.
tCH
tCH
tCH
tCH
SCLK
SDA
D0
D7
D8
A8 A9
A0
A7
0
0 0 0 0 0
0 0 0 0 0 0 0
1
0 1 0 0 1 0 0
Command code
input (2516)
Program address
input (L)
Program address
input (H)
Program data
input (L)
Program data
input (H)
tCP
tWP
PGM
Program
Fig. 29 Timing at programming
(5) Program verify
and verified and stored into the internal data latch. When the
PGM pin is released back to “H” and serial clock is input to the
SCLK pin, the verify data that has been stored into the data
latch is serially output from the SDA pin.
Input command code 3516 in the first transfer. Proceed and
input the low-order 8 bits and high-order 8 bits of the address
and the low-order 8 bits and high-order 8 bits of program data,
and pull the PGM pin to “L.” When this is done, the program
data is programmed to the specified address. Then, when the
PGM pin is pulled to “L” again after it is released back to “H,”
the address programmed with the program command is read
tCH
tCH
tCH
tCH
SCLK
SDA
D0
D7
D8
A8 A9
A0
A7
0
0 0 0 0 0
0 0 0 0 0 0 0
1
0 1 0 1 1 0 0
Command code
input (3516)
Program address
input (L)
Program address
input (H)
Program data
input (L)
Program data
input (H)
tCP
tWP
PGM
Program
tCH
SCLK
SDA
D0
D7
D8
0 0 0 0 0 0
0
Verify data output (L) Verify data output (H)
tRC
tCR
tWR
PGM
Verify
Note: When outputting the verify data, the SDA pin is switched for output at the first falling of the serial clock. The SDA pin is
placed in the high-impedance state during the th(C–E) period after the last rising edge of the serial clock (at the 16th bit).
Fig. 30 Timing at program verifying
MITSUBISHI
ELECTRIC
42
MITSUBISHI [ Mitsubishi Group ]
