SAF82532N10V32A Infineon Technologies, SAF82532N10V32A Datasheet - Page 108

• Manufacturer Part Number: SAF82532N10V32A
• Description: IC CONTROLLER 2-CH SER 68-PLCC
• Manufacturer: Infineon Technologies

Specifications of SAF82532N10V32A

• Controller Type: Serial Communications Controller (SCC)
• Interface: Serial
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 8mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• Other names: SAF82532N10V32A; SAF82532N10V32AIN

SAB 82532/SAF 82532
Operational Description
9.3.1.2 DMA Mode
Prior to data transmission, the length of the next frame (or the next block of characters)
to be transmitted must be programmed via the Transmit Byte Count Registers (XBCH,
XBCL). The resulting byte count equals the programmed value plus one byte, i.e. since
12 bits are provided via XBCH, XBCL (XBC11 … XBC0) a frame length of 1 up to 4096
bytes (4 Kbytes) can be selected.
After this, data transmission can be initiated by command (XTF or XIF in HDLC/SDLC
mode, XF in ASYNC and BISYNC mode). The ESCC2 will then autonomously request
the correct amount of write cycles by activating the DRT line for as long as necessary,
taking into account the selected data bus width (i.e. byte or word accesses). For a frame
length of L = (n
32 + remainder) bytes (n = 0, 1, … ,128), block data transfers of 32
bytes/16 words or remainder ( 2) bytes (words) are requested whenever a 32-byte
FIFO half (transmit pool) is empty and accessible to the DMA controller.
The following figure gives an example of a DMA driven transmission sequence with a
supposed frame length of 70 bytes, i.e. programmed transmit byte count (XCNT) equal
to 69 bytes.
Figure 48
DMA Driven Transmission Sequence Example (HDLC)
Semiconductor Group
108
07.96