SAB82538 Datasheet, PDF (26/253 Pages) Infineon Technologies AG – ICs for Communications

SAB 82538
SAF 82538
1.4.2 Environment
1.4.2.1 ESCC8 with SAB 80188 Microprocessor
A system with minimized additional hardware expense can be build up with a SAB 80188
microprocessor as shown in figure 4.
Figure 4
ESCC8 with SAB 80188 CPU
The ESCC8 is connected to the demultiplexed system bus. Data transfer for one serial
channel can be done by the 2-channel on-chip DMA controller of the 80188, the other
channels are serviced by interrupt. Since the 80188 does not provide DMA Acknowledge
outputs, data transfer from/to ESCC8 is controlled via CS, RD or WR Address
information (A1 … A8) and the DACK0-7 inputs are not used. A0 and BHE/BLE are used
to select byte or word access.
Semiconductor Group
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