TDA9951 datasheet(5/41 Pages) PHILIPS

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TDA9951_1

Product data sheet

Rev. 01 — 7 August 2008

5 of 41

NXP Semiconductors

TDA9951

CEC/I2C-bus translator

[1]

P = power supply, I = input, O = output and I/O = Input and Output.

[2]

See Figure 15 “Application diagram” on page 35.

8.

Functional description

The TDA9951 controls the interface between the CEC-line and the I2C-bus using its

internal processor and embedded software.

8.1 Device addressing

The SDA and SCL pins are managed by the I2C-bus peripheral which automatically

communicates in Standard mode (100 kbit/s) or Fast mode (400 kbit/s) as an I2C-bus

slave.

The TDA9951 signals the host processor that data is ready by asserting the INT output.

The polarity is conﬁgurable using the INT_POL bit in the CCONR register (see Table 14).

VFD_STR

13

O

VFD strobe line. Pulsed HIGH latches clocked output at the VFD

driver

VFD_BLK

14

O

VFD blank line. Default HIGH blanks output at the VFD display

driver. The polarity is conﬁgurable using the I2C-bus

KCOL

15

O

key matrix column output[2]

PSEN

16

I

power sense input detects power supply type.

LOW-level = battery

HIGH-level = main power

RSVD0

17

I

reserved pin; connect to ground

RSVD1

18

O

reserved pin

KROW4

19

I

key matrix row input[2]

KROW3

20

I

key matrix row input[2]

VDD

21

P

power supply voltage

KROW2

22

I

key matrix row input[2]

KROW1

23

I

key matrix row input[2]

KROW0

24

I

key matrix row input[2]

RSVD2

25

O

reserved pin

A0

26

I

I2C-bus slave address bit. This pin conﬁgures the least

signiﬁcant bit A0 of the I2C-bus slave address; connect to:

VDD (HIGH) sets A0 to logic 1 (address 35h)

VSS (LOW) sets A0 to logic 0 (address 34h)

IR_VAL

27

O

pulse LOW for 65 ms after every valid IR frame is received, to

indicate activity using an LED

IR_DAT

28

I

input from external infrared demodulator.

LOW-level = active IR pulse,

HIGH-level = no IR pulse (a space)

Table 3.

Pin description …continued

Symbol

Type[1]

Description

Số phần tương tự - TDA9951

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
NXP Semiconductors	TDA9950	425Kb / 22P	CEC/I2C-bus translator Rev. 02-22 October 2009
	TDA9950TT	425Kb / 22P	CEC/I2C-bus translator Rev. 02-22 October 2009
	TDA9952	132Kb / 28P	10-bit, 3.0 V, 25 Msps analog-to-digital interface for CCD cameras 2002 Aug 21
	TDA9952HL	132Kb / 28P	10-bit, 3.0 V, 25 Msps analog-to-digital interface for CCD cameras 2002 Aug 21
	TDA9952HN	132Kb / 28P	10-bit, 3.0 V, 25 Msps analog-to-digital interface for CCD cameras 2002 Aug 21

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NXP Semiconductors	PCA9306_1011	504Kb / 26P	Dual bidirectional I2C-bus and SMBus voltage-level translator Rev. 6-25 November 2010
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