SAF82525 Infineon Technologies AG, SAF82525 Datasheet - Page 19

• Manufacturer Part Number: SAF82525
• Description: Data Communications ICs
• Manufacturer: Infineon Technologies AG

HSCX with SAB 80188 Microprocessor
A system with minimized additional hardware expense can be with a SAB 80188
microprocessor as shown in figure 4.
Figure 4
HSCX with SAB 80188 CPU
The HSCX 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 SAB 80188, the other channel is
serviced by interrupt. Since the SAB 80188 does not provide DMA acknowledge outputs, data
transfer from/to HSCX is controlled via CS, RD or WR address information (A0 … A6) and the
DACKA, DACKB inputs are not used.
This solution supports applications with a high speed data rate in one serial channel with
minimum hardware expense making use of the on-chip peripheral functions of the SAB 80188
(chip select logic, interrupt controller, DMA controller).
Semiconductor Group
Latches
SAB 80188
CPU
INTn
A8 - A15
AD0 - AD7
PSCn
Transceiver
DRQ0
DRQ1
+5 V
System Bus
Memory
System
19
DRQTA
DRQRA
DACKA
ALE
DACKB
A0-A6
A0 - A6
CS
SAB 82525
HSCX
+5 V
INT
D0 - D7
D0-D7
IM1
Serial
Channel A
Serial
Channel B
ITS00949
SAB
SAB
SAF
SAF
82525
82526
82525
82526