Renesas PCA7429G02 Informazioni Techniche Scaricare il pdf (Pagina 40)

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER

and ON-SCREEN DISPLAY CONTROLLER

M37272M6/M8–XXXSP/FP, M37272MA–XXXSP

M37272E8SP/FP, M37272EFSP

MITSUBISHI MICROCOMPUTERS

Rev. 1.3

8.6.6 START Condition Generation Method

When the ESO bit of the I

C control register (address 00F916) is “1,”

execute a write instruction to the I

C status register (address 00F816)

to set the MST, TRX and BB bits to “1.” A START condition will then

be generated. After that, the bit counter becomes “0002” and an SCL

for 1 byte is output. The START condition generation timing and BB

bit set timing are different in the standard clock mode and the high-

speed clock mode. Refer to Figure 8.6.9 for the START condition

generation timing diagram, and Table 8.6.2 for the START condition/

STOP condition generation timing table.

Fig. 8.6.9 START Condition Generation Timing Diagram

8.6.7 STOP Condition Generation Method

When the ESO bit of the I

C control register (address 00F916) is “1,”

execute a write instruction to the I

C status register (address 00F816)

for setting the MST bit and the TRX bit to “1” and the BB bit to “0”. A

STOP condition will then be generated. The STOP condition genera-

tion timing and the BB flag reset timing are different in the standard

clock mode and the high-speed clock mode. Refer to Figure 8.6.10

for the STOP condition generation timing diagram, and Table 8.6.2

for the START condition/STOP condition generation timing table.

Fig. 8.6.10 STOP Condition Generation Timing Diagram

Table 8.6.2 START Condition/STOP Condition Generation Tim-

ing Table

Item

Setup time

(START condition)

Setup time

(STOP condition)

Hold time

Set/reset time

for BB flag

Standard Clock Mode

5.0 µs (20 cycles)

4.25 µs (17 cycles)

5.0 µs (20 cycles)

3.0 µs (12 cycles)

High-speed Clock Mode

2.5 µs (10 cycles)

1.75 µs (7 cycles)

2.5 µs (10 cycles)

1.5 µs (6 cycles)

Note: Absolute time at φ = 4 MHz. The value in parentheses denotes the

number of φ cycles.

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 144 145

Commenti su questo manuale

Nessun commento

Renesas PCA7429G02 Informazioni Techniche Pagina 40

Commenti su questo manuale

Prodotti e manuali riguardandi Decoder Renesas PCA7429G02