peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 311

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

Semiconductor Group
OV
RBC11…8 Receive Byte Count high.
5.1.1.5.22 Version Status Register (VSTR)
Access: read
VN3…0
5.1.1.6
5.1.1.6.1
Access: read
Reset value: xx
RD7…0
Interrupt controlled data transfer (interrupt mode, selected if DMA-bit in register
XBCH is reset).
Up to 32 bytes of received data can be read from the RFIFO following an RPF or an RME
interrupt.
RPF-interrupt:
RME-interrupt:
DMA controlled data transfer (DMA-mode, selected if DMA-bit in register XBCH is set).
If the RFIFO contains 32 bytes, the SACCO autonomously requests a block data transfer
by activating the DRQRA/B-line as long as the 31st read cycle is finished. This forces the
DMA-controller to continuously perform bus cycles until 32 bytes are transferred from the
SACCO to the system memory (DMA-controller mode: demand transfer, level triggered).
bit 7
bit 7
RD7
1
SACCO-B Register Description
Receive FIFO (RFIFO)
Counter Overflow.
A ‘1’ indicates that more than 4095 bytes were received.
The received frame exceeded the byte count in RBC11…RBC0.
Together with RBCL (bits RBC7…RBC0) the length of the received frame
can be determined.
82
83
Receive Data 7…0, data byte received on the serial interface.
RD6
H
H
H
: SACCO-A in DOC V1.1
: SACCO-A in DOC V2.1.
0
exactly 32 bytes to be read.
the number of bytes can be determined reading the registers
RBCL, RBCH.
RD5
0
RD4
0
5-68
VN3
RD3
RD2
VN2
Description of Registers
RD1
VN1
PEB 20560
bit 0
bit 0
RD0
VN0
2003-08