XC56309PV100A Freescale Semiconductor, XC56309PV100A Datasheet - Page 12

• Manufacturer Part Number: XC56309PV100A
• Manufacturer: Freescale Semiconductor

Specifications of XC56309PV100A

• Device Core Size: 24b
• Format: Fixed Point
• Clock Freq (max): 100MHz
• Mips: 100
• Device Input Clock Speed: 100MHz
• Ram Size: 102KB
• Program Memory Size: Not RequiredKB
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: -40C to 100C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: LQFP
• Lead Free Status / Rohs Status: Not Compliant

Signals/Connections
1.7 Host Interface (HI08)
The HI08 provides a fast, 8-bit, parallel data port that connects directly to the host bus. The HI08 supports a variety
of standard buses and connects directly to a number of industry-standard microcomputers, microprocessors, DSPs,
and DMA hardware.
1.7.1
Careful synchronization is required when the system reads multiple-bit registers that are written by another
asynchronous system. This is a common problem when two asynchronous systems are connected (as they are in the
Host port). The considerations for proper operation are discussed in Table 1-10.
1.7.2
HI08 signal functions vary according to the programmed configuration of the interface as determined by the 16 bits
in the HI08 Port Control Register.
1-8
Asynchronous read of receive byte
registers
Asynchronous write to transmit byte
registers
Asynchronous write to host vector
H[0–7]
HAD[0–7]
PB[0–7]
Signal Name
Host Port Usage Considerations
Host Port Configuration
Action
Input or Output
Input/Output
Input/Output
Type
When reading the receive byte registers, Receive register High (RXH), Receive register Middle
(RXM), or Receive register Low (RXL), the host interface programmer should use interrupts or poll
the Receive register Data Full (RXDF) flag that indicates data is available. This assures that the data
in the receive byte registers is valid.
The host interface programmer should not write to the transmit byte registers, Transmit register High
(TXH), Transmit register Middle (TXM), or Transmit register Low (TXL), unless the Transmit register
Data Empty (TXDE) bit is set indicating that the transmit byte registers are empty. This guarantees
that the transmit byte registers transfer valid data to the Host Receive (HRX) register.
The host interface programmer must change the Host Vector (HV) register only when the Host
Command bit (HC) is clear. This practice guarantees that the DSP interrupt control logic receives a
stable vector.
Table 1-10.
State During
Ignored Input
Reset
DSP56309 Technical Data, Rev. 7
1,2
Table 1-11.
Host Port Usage Considerations
Host Data—When the HI08 is programmed to interface with a non-multiplexed
host bus and the HI function is selected, these signals are lines 0–7 of the
bidirectional Data bus.
Host Address—When the HI08 is programmed to interface with a multiplexed
host bus and the HI function is selected, these signals are lines 0–7 of the
bidirectional multiplexed Address/Data bus.
Port B 0–7—When the HI08 is configured as GPIO through the HI08 Port
Control Register, these signals are individually programmed as inputs or outputs
through the HI08 Data Direction Register.
Host Interface
Description
Signal Description
Freescale Semiconductor