LC72F3661
No.0461-12/15
Continued from preceding page.
Pin name
Pin No.
I/O
Pin explanation
Equivalent circuit
P00
P01
P02
P03
44
43
42
41
I/O
General-purpose I/O ports
The mode is switched between input and output with the IOS
instruction.
Input is disabled and the pins go to the high-impedance state in
Backup mode.
These ports are set up as general-purpose input ports after a power
on reset.
PQ0 to 3
PR0 to 3
PS0 to 3
40 to 37
36 to 33
30 to 27
I/O
General-purpose I/O ports.
The mode is switched between input and output with the IOS
instruction, and data is input with the INR instruction and output with
the OUTR instruction.
The SPB, RPB, TPT, and TPF instruction cannot be used with these
ports.
Input is disabled and the pins go to the high-impedance state in
Backup mode.
These ports are set up as general-purpose input ports after a power
on reset.
TEST1
TEST2
79
2
LSI test pins.
These pins must be connected to GND.
Concerning Differences from the LC723661 Mask Versions
Item
Mask version (LC723661, 2, and 3)
OTP version (LC72F3661)
Design rule
0.35
process
0.45
process
ROM
Masked ROM structure
Flash ROM structure
Write mode
Not available
Available
Design Considerations
1) Although the electrical specifications are the same for the mask and OTP versions, differences may arise in the actual
values for the threshold level of the input ports, output current of the output ports, input sensitivity, etc. Variations
may also be found from lot to lot. It must therefore be kept in mind that if finished products are designed using the
actual values of the samples, these variations may prevent the finished products from operating.
2) The undesirable radiation level is not listed among the specifications. Since differences may arise between the mask
and OTP versions, this must be kept in mind when designing the finished products.
Concerning ROM Writing
1) The job of writing data onto the ROM in-house at SANYO Semiconductor is not currently supported.
2) The LC72F3661 circuit board must be requested as the data writing board.
3) The AF-9706 or AF-9708 made by Ando or the 1890A or 1881XP made by Minato is recommended as the ROM
writer.
ILC05544
BACK UP