AN2244 Freescale Semiconductor / Motorola, AN2244 Datasheet - Page 4

• Manufacturer Part Number: AN2244
• Description: Interconnecting Two MSC8101ADS Boards Across a 60x-Compatible Bus to the Host Interface
• Manufacturer: Freescale Semiconductor / Motorola

System Bus–HDI16 Host Interface
4
Registers Visible to Host
Internally-Visible Registers
HCR
ISR
16
16
NOTE1: Both HOTX and HORX are FIFOs with a capacity of four 64-bit words.
HSR
ICR
RX[0–3]
TX[0–3]
16
16
CVR
ICR
ISR
HORX
HCVR
HPCR
HOTX
HCR
HSR
HCVR
CVR
Freescale Semiconductor, Inc.
16
16
Figure 2. MSC8101 HDI16 Port Registers
For More Information On This Product,
HPCR
Accessed by the Host Processor
Host Command Vector Register
16
Accessed by the SC140 core
Command Vector Register
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Host Transmit Data Register
Interface Control Register
Host Receive Data Register
DMA Data Bus
Interface Status Register
Transmit Data Registers
Host Port Control Register
QBus Data Bus
Receive Data Registers
Host Control Register
Host Status Register
RX0
Host Bus
16
64
RX1
HOTX
16
RX2
64
16
RX3
RX0
TX0
0x7
0x7
16
RX1
TX1
0x6
0x6
TX0
0x0000
0x0040
0x0020
0x0080
0x00A0
0x0060
0x2
0x0
0x1
16
RX2
TX2
0x5
0x5
64
TX1
HORX
16
RX30
TX3
TX2
0x4
x4
64
16
TX3
16