psb21381 Infineon Technologies Corporation, psb21381 Datasheet - Page 34

• Manufacturer Part Number: psb21381
• Description: Siemens Codec With S/t Transceiver
• Manufacturer: Infineon Technologies Corporation

Data Sheet
The mapping of all accessible registers can be found in figure 92 in chapter 7.
The microcontroller interface also consists of a microcontroller clock generation at pin
MCLK and an interrupt request at pin INT.
2.1.1
The serial control interface (SCI) is compatible to the SPI interface of Motorola or
Siemens C510 family of microcontrollers.
The SCI consists of 4 lines: SCLK, SDX, SDR and CS. Data are transferred via the lines
SDR and SDX at the rate given by SCLK. The falling edge of CS indicates the beginning
of a serial access to the registers. Incoming data is latched at the rising edge of SCLK
and shifts out at the falling edge of SCLK. Each access must be terminated by a rising
edge of CS. Data is transferred in groups of 8 bits with the MSB first.
Figure 15 shows the timing of a one byte read/write access via the serial control
interface.
Serial Control Interface (SCI)
24
PSB 21381/2
PSB 21383/4
Interfaces
2001-03-12