DSP56F803EVM Freescale Semiconductor, DSP56F803EVM Datasheet - Page 12

• Manufacturer Part Number: DSP56F803EVM
• Description: KIT EVALUATION FOR DSP56F803
• Manufacturer: Freescale Semiconductor

Specifications of DSP56F803EVM

• Processor To Be Evaluated: 56F803
• Data Bus Width: 16 bit
• Interface Type: RS-232, JTAG
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2.5 Interrupt and Program Control Signals
12
No. of
No. of
No. of
Pins
Pins
Pins
1
1
1
1
16
1
1
Signal
Name
WR
DS
RD
PS
D0–D15
Signal
Name
Signal
IRQA
IRQB
Name
Signal
Output
Output
Output
Output
Type
Input/O
Signal
(Schmitt)
(Schmitt)
Type
utput
Signal
Table 2-9 Interrupt and Program Control Signals
Type
Input
Input
State During
Tri-stated
Tri-stated
Tri-stated
Tri-stated
Reset
State During
Tri-stated
State During
Table 2-8 Bus Control Signals
Reset
Reset
Table 2-7 Data Bus Signals
Input
Input
56F803 Technical Data, Rev. 16
Program Memory Select—PS is asserted low for external Program memory
access.
Data Memory Select—DS is asserted low for external Data memory access.
Write Enable—WR is asserted during external memory write cycles. When
WR is asserted low, pins D0–D15 become outputs and the device puts data
on the bus. When WR is deasserted high, the external data is latched inside
the external device. When WR is asserted, it qualifies the A0–A15, PS, and
DS pins. WR can be connected directly to the WE pin of a Static RAM.
Read Enable—RD is asserted during external memory read cycles. When
RD is asserted low, pins D0–D15 become inputs and an external device is
enabled onto the device data bus. When RD is deasserted high, the external
data is latched inside the controller. When RD is asserted, it qualifies the
A0–A15, PS, and DS pins. RD can be connected directly to the OE pin of a
Static RAM or ROM.
Data Bus— D0–D15 specify the data for external Program or Data
memory accesses. D0–D15 are tri-stated when the external bus is
inactive. Internal pull-ups may be active.
External Interrupt Request A—The IRQA input is a synchronized
external interrupt request indicating an external device is requesting
service. It can be programmed to be level-sensitive or
negative-edge- triggered.
External Interrupt Request B—The IRQB input is an external
interrupt request indicating an external device is requesting service.
It can be programmed to be level-sensitive or
negative-edge-triggered.
Signal Description
Signal Description
Signal Description
Freescale Semiconductor