參數(shù)資料
型號: UPD16434
廠商: NEC Corp.
英文描述: 1/8, 1/16 DUTY LCD CONTROLLER/DRIVER
中文描述: 1 / 8,1 / 16稅LCD控制器/驅(qū)動
文件頁數(shù): 27/64頁
文件大?。?/td> 314K
代理商: UPD16434
Data Sheet S10299EJ4V0DS00
27
μ
PD16434
4. SELECTING
μ
PD16434 INTERFACE FUNCTION WITH CPU
The command/data for the
μ
PD16434 is 8 bits long. However, serial interfacing with the CPU is made in 8-bit
transfer or parallel interfacing is made in two 4-bit transfers. In addition, the
μ
PD16434 is provided with a chip address
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).
Figure 4–1. Interface Specification Timing Waveforms
RESET
D2(CAE)
D1(P, /S)
Table 4–1. Interface Specification Code
D2(CAE)
D1(P, /S)
Serial/parallel
specification
Chip address
selection function
0
0
Serial
Unprovided
1
0
Provided
0/1
1
Parallel
4.1 Functions of Shared Pins
The function of the /STB, /SCK, D3/SO, and the D0/SI pins used for clock input and data input/output differ,
depending on whether the serial interface or the parallel interface is specified, as indicated in Table4–2.
Table 4–2. Function of Shared Pins
Pin name
Serial (P, /S = 0)
Parallel (P, /S = 1)
/STB, /SCK
/SCK input
/STB input
D3/SO
SO output
D3 to D0 input/output
D2(CAE)
(4-bit parallel data bus)
D1(P, /S)
D0/SI
SI input
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