BK4819

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1.3

SPI Interface

The BK4819 has 3-wires SPI interface. These 3 wires are SCK(PIN25),

SCN(PIN26, SDATA(PIN27) for data exchange. SCK and SCN are input pins,

while SDATA is bi-direction pin.

BK4819 always latch data at the SCK rising edge and output its data at SCK

falling edge.

R/W A6

...

A0

D15 D14

D1

D0

SCK

SDATA

SCN

A1

...

A5

Figure 5. Three-wires Interface Timing

2 Electrical Specifications

2.1

Absolute Maximum Ratings

Maximum ratings are the extreme limits to which BK4819 can be exposed

without permanently damaging it. Exposure to absolute maximum ratings for

prolonged periods of time may affect BK4819’s reliability. Table 1 specifies the

absolute maximum ratings for BK4819.

Table 1. Absolute Maximum Ratings

Parameter

Symbol

Min

Typ

Max

Unit

Supply Voltage

VDD

-0.3

—

+3.6

V

I/O pin voltage

VIO

-0.3

—

VDD+0.3

V

Storage Temperature

TS

–40

25

105

°C

2.2

Recommended Operating Conditions

The operating conditions are the physical parameters that BK4819 can operate

within. The operating conditions for BK4819 are defined in Table 2.

Table 2. Recommended Operating Conditions

Parameter

Symbol

Min

Typ

Max

Unit

Supply Voltage

VDD

2.6

—

3.6

V

Operating Temperature

TO

–30

25

85

°C

Notes:

All minimum and maximum specifications are guaranteed and apply across the

recommended operating conditions. Typical values apply at VDD=3.3 V and 25 °C unless