M37225M6_15 datasheet(36/128 Pages) RENESAS

Part #	M37225M6

Description	SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

Download	128 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

Logo

36 / 128 page

M37225M6/M8/MA/MC-XXXSP, M37225ECSP

Rev.1.00

Nov 01, 2000

page 34 of 124

REJ03B0136-0100Z

8.6.3 I2C Clock Control Register

The I2C clock control register (address 00DB16) is used to set ACK

control, SCL mode and SCL frequency.

(1) Bits 0 to 4: SCL frequency control bits (CCR0–CCR4)

These bits control the SCL frequency.

(2) Bit 5: SCL mode specification bit (FAST MODE)

This bit specifies the SCL mode. When this bit is set to “0,” the stan-

dard clock mode is set. When the bit is set to “1,” the high-speed

clock mode is set.

(3) Bit 6: ACK bit (ACK BIT)

This bit sets the SDA status when an ACK clock✽ is generated. When

this bit is set to “0,” the ACK return mode is set and SDA goes to

LOW at the occurrence of an ACK clock. When the bit is set to “1,”

the ACK non-return mode is set. The SDA is held in the HIGH status

at the occurrence of an ACK clock.

However, when the slave address matches the address data in the

reception of address data at ACK BIT = “0,” the SDA is automatically

made LOW (ACK is returned). If there is a mismatch between the

slave address and the address data, the SDA is automatically made

HIGH (ACK is not returned).

✽ACK clock: Clock for acknowledgement

Fig. 8.6.4 I2C Address Register

(4) Bit 7: ACK clock bit (ACK)

This bit specifies a mode of acknowledgment which is an acknowl-

edgment response of data transmission. When this bit is set to “0,”

the no ACK clock mode is set. In this case, no ACK clock occurs

after data transmission. When the bit is set to “1,” the ACK clock

mode is set and the master generates an ACK clock upon comple-

tion of each 1-byte data transmission.The device for transmitting

address data and control data releases the SDA at the occurrence of

an ACK clock (make SDA HIGH) and receives the ACK bit generated

by the data receiving device.

Note: Do not write data into the I2C clock control register during transmission.

If data is written during transmission, the I2C clock generator is reset, so

that data cannot be transmitted normally.

b7 b6 b5 b4 b3 b2 b1 b0

I2C clock control register (S2) [Address 00DB16]

I2C Clock Control Register

0

to

4

SCL frequency control bits

(CCR0 to CCR4)

7

5

6

SCL mode

specification bit

(FAST MODE)

0: Standard clock mode

1: High-speed clock mode

0

Standard clock

mode

B

Name

Functions

After reset R W

0

ACK bit

(ACK BIT)

ACK clock bit

(ACK)

0: ACK is returned.

1: ACK is not returned.

0: No ACK clock

1: ACK clock

High speed

clock mode

Setup disabled Setup disabled

00 to 02

Setup disabled

333

03

Setup disabled

250

04

100

400 (See note)

05

83.3

166

06

500/CCR value 1000/CCR value

17.2

34.5

1D

16.6

33.3

1E

16.1

32.3

1F

(at

φ = 4 MHz, unit : kHz)

Note: At 400 kHz in the high-speed clock mode, the duty is as below .

“0” period : “1” period = 3 : 2

In the other cases, the duty is as below.

“0” period : “1” period = 1 : 1

Setup value of

CCR4–CCR0

R W

Similar Part No. - M37225M6_15

Manufacturer	Part #	Datasheet	Description
Mitsubishi Electric Sem...	M37225M6	1Mb / 133P	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER???
Renesas Technology Corp	M37225M6	1Mb / 126P	SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

More results

Similar Description - M37225M6_15

Manufacturer	Part #	Datasheet	Description
Renesas Technology Corp	M37225M6	1Mb / 126P	SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
Mitsubishi Electric Sem...	M37224M3	901Kb / 83P	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER???
Renesas Technology Corp	M37221M4H	1Mb / 112P	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
Renesas Technology Corp	M37221M6	1Mb / 62P	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
Mitsubishi Electric Sem...	M37221EF	1Mb / 63P	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER???
	M37100M8	1Mb / 49P	SINGLE CHIP 8 BIT CMOS MICROCOMPUTER FOR VOLTAGE SYNTHESIZER WITH ON SCREEN DISPLAY CONTROLLER
	M37102M8	1Mb / 51P	SINGLE CHIP 8 BIT CMOS MICROCOMPUTER FOR VOLTAGE SYNTHESIZER WITH ON SCREEN DISPLAY CONTROLLER
	M37210M3	764Kb / 59P	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER?
Renesas Technology Corp	M37224M3	1Mb / 84P	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
Renesas Technology Corp	M37210M3	1,000Kb / 60P	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

More results

M37225M6 Datasheet(PDF) 36 Page - Renesas Technology Corp

M37225M6 Datasheet(HTML) 36 Page - Renesas Technology Corp

Similar Part No. - M37225M6_15

Similar Description - M37225M6_15

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL