MSC8101PG Motorola / Freescale Semiconductor, MSC8101PG Datasheet - Page 16

• Manufacturer Part Number: MSC8101PG
• Description: MSC8101PG 16-Bit Digital Signal Processor Quick Reference
• Manufacturer: Motorola / Freescale Semiconductor

External Signals
8
D[48–51]
HA[0–3]
HREQ
HTRQ
Name
HCS1
HRW
HWR
HRD
HDS
D52
D53
D54
D55
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Direction
Output
Output
Input
Input
Input
Input
Input
Input
Data
Table 3-1. External Signals–SIU and Extended Core (Continued)
60x Data Bus Bits 48–51
In write transactions the 60x bus master drives the valid data on this pin. In read
transactions the 60x slave drives the valid data on this pin.
Host Address Lines 0–3
When the HDI16 interface bus is enabled, this address line addresses internal host
registers.
60x Data Bus Bit 52
In write transactions the 60x bus master drives the valid data on this pin. In read
transactions the 60x slave drives the valid data on this pin.
Host Chip Select
When the HDI16 interface is enabled, this is the chip-select pin. The polarity of this pin is
programmable.
60x Data Bus Bit 53
In write transactions the 60x bus master drives the valid data on this pin. In read
transactions the 60x slave drives the valid data on this pin.
Host Read Strobe
When the HDI16 is programmed to interface with a double data strobe host bus, this pin
is the read data strobe input (HRD). The polarity of the data strobe is programmable.
Host Read Write Select
When the HDI16 interface is enabled in Single Strobe mode, this is the read/write input
(HRW).
60x Data Bus Bit 54
In write transactions the 60x bus master drives the valid data on this pin. In read
transactions the 60x slave drives the valid data on this pin.
Host Write Data Strobe
When the HDI16 is programmed to interface with a double data strobe host bus, this pin
is the write data strobe input (HWR). The polarity of the data strobe is programmable.
Host Data Strobe
When the HDI16 is programmed to interface with a single data strobe host bus, this pin
is the data strobe input (HDS). The polarity of the data strobe is programmable.
60x Data Bus Bit 55
In write transactions the 60x bus master drives the valid data on this pin. In read
transactions the 60x slave drives the valid data on this pin.
Transmit Host Request
When the HDI16 is programmed to interface with a double host request host bus, this
pin is the transmit host request output (HTRQ). The polarity of the host request is
programmable. The host request is an open-drain output.
Host Request
When the HDI16 is programmed to interface with a single host request host bus, this pin
is the host request output (HREQ). The polarity of the host request is programmable.
The host request may be programmed as a driven or open-drain output.
MSC8101 Programmer’s Quick Reference
Description