PEB20534H-10 SIEMENS [Siemens Semiconductor Group], PEB20534H-10 Datasheet - Page 87

• Manufacturer Part Number: PEB20534H-10
• Description: DMA Supported Serial Communication Controller with 4 Channels DSCC4
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Table 16
Offset
Addr.
004C
Semiconductor Group
H
Access
Type
r/w
Bit-Fields
Pos.
6..0
8
7
Central FIFO Control Registers (cont’d)
Controlled
by
CPU
Name
RF
THRESH
M4
M2
Reset
Value
00000000
Default
0
0
0
87
H
Description
Register Name
FIFOCR3:
FIFO Control Register 3
Receive FIFO Threshold
Receive FIFO Threshold in number of
DWORDs. A watermark is calculated by:
watermark = RFTHRESH*M_x.
When more data than specified by this
watermark is available in the receive
FIFO the DMA controller is requested to
transfer data to the channel specific data
buffers in host memory until the receive
FIFO is empty.
Multiplier 4
Multiplier 2
DMA Controller and Central FIFOs
Data Sheet 09.98
PEB 20534