UPD16434 NEC, UPD16434 Datasheet - Page 27

• Manufacturer Part Number: UPD16434
• Description: 1/8/ 1/16 DUTY LCD CONTROLLER/DRIVER
• Manufacturer: NEC

4. SELECTING
transfer or parallel interfacing is made in two 4-bit transfers. In addition, the
selection function for multi-chip system configuration. Whether the serial or parallel interface is used and whether or not
the chip address select function is used are specified by the data on the D2 (CAE) line and D1 (P, /S) line at the RESET
signal release timing (falling edge).
4.1 Functions of Shared Pins
The command/data for the
depending on whether the serial interface or the parallel interface is specified, as indicated in Table4–2.
/STB, /SCK
D3/SO
D2(CAE)
D1(P, /S)
D0/SI
The function of the /STB, /SCK, D3/SO, and the D0/SI pins used for clock input and data input/output differ,
0
1
0/1
Pin name
D2(CAE)
D2(CAE)
D1(P, /S)
RESET
PD16434 INTERFACE FUNCTION WITH CPU
PD16434 is 8 bits long. However, serial interfacing with the CPU is made in 8-bit
Figure 4–1. Interface Specification Timing Waveforms
0
0
1
Table 4–1. Interface Specification Code
/SCK input
SO output
SI input
Table 4–2. Function of Shared Pins
D1(P, /S)
Data Sheet S10299EJ4V0DS00
Serial (P, /S = 0)
–
–
Serial
Parallel
Serial/parallel
specification
PD16434 is provided with a chip address
/STB input
D3 to D0 input/output
(4-bit parallel data bus)
Unprovided
Provided
selection function
Parallel (P, /S = 1)
Chip address
PD16434
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