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L9848

Figure 4. SPI input/output slew ratest

Figure 5. SPI timing diagram

FUNCTIONAL DESCRIPTION

General Features

The L9848 IC is a monolithic integrated circuit, which provides high flexibility for driving medium loads. 8 out-

puts, whereof 6 (Output1-6) can be used as either internal low or high side drives in any combination and 2 are

dedicated low side outputs (Output7-8). The use of this device reduces the I/O port requirements of the micro-

processor by having serially controlled outputs via a SPI interface. In addition, Output5-6 are capable of being

PWMed via an external pin (Input5-6). The 8bit SPI input is used to command the 8 output drivers either ON or

OFF and additional to indicate latched fault conditions that may have occurred. Multiple L9848s may be daisy-

chained with one additional microprocessor I/O port (CSn) for each device. The implemented self-configuration

allows the user to connect a high or low side load to any of these outputs and the L9848 will drive them correctly

SCLK

CS

DO

DI

10%

90%

10%

90%

90%

10%

10%

90%

MSB In

Bit 14 or 6

Bits 12 to 0

Bit 13 or 5

Fault MSB

Bits 6 to 1

Fault LSB

DI Data byte

CS

SCLK

DO

DI