MC68QH302 Datasheet, PDF (2/6 Pages) Freescale Semiconductor, Inc – Quad HDLC Integrated Multiprotocol Processor

Freescale Semiconductor, Inc.
M68000
Core
RISC
Controller
Interrupt
Controllers
General-Purpose
DMA
Channel
3 Timers
4 Chip Selects
Parallel I/O
68000
System Bus
8 DMA
Channels
1152 Bytes
Dual-Ported
RAM
RAM
+
ROM
20 Address Lines
8/16 Data Lines
Peripheral Bus
MC68QH302
SCC1
(2 Channels)
SCC2
+
SCC3
SCP
+
2 SMCs
Figure 1. MC68QH302 Block Diagram
The MC68QH302 supports a full ISDN basic rate interface with one serial channel left over to communicate
with the DTE as shown in Figure 2. The dual-channel SCC1 is used to support the two B channels.
Flash +
RAM +
EEPROM
MC68QH302
SCC1*
SCC3
IDL
or
GCI
2B + D
SCC2
145572
U-INTF
or
145574
S/T INTF
X-FRMR
and
Line I/F
MC145407
RS232-C
Note: *SCC1 = Dual channel SCC, each channel used for a B channel
Figure 2. MC68QH302 Supporting a Full ISDN Basic Rate Interface
MC68QH302 Technical Summary
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