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DPC31 HW

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DPC31 HW Description

Version V1.0 Page 11

2.4 Pin Description

The DPC31 has a 100 pin PQFP package with the following signals:

Function Group Name Pins Type Voltage

Proof

Function

C31 Interface PA 8 I/O 5V Corresponds to P0 for the discrete type

PB 8 I/O 5V Corresponds to P1 for the discrete type

PC 8 I/O 5V Corresponds to P2 for the discrete type

PD 8 I/O 5V Corresponds to P3 for the discrete type

ALE 1 I/O 5V Address Latch Enable

XPSEN 1 I/O 5V For emulation only

XCSDATA 1 O 5V Chip select for external RAM

XCSCODE 1 O 5V Chip select for external ROM

BOOTTYP 2 I 5V Type for loading the user program

DBX 1 I 5V Switch to In Circuit Emulator

µP Interface PE 8 I/O 5V

PF 8 I/O 5V

PG 8 I/O 5V

PH 3 I/O 5V

BUSTYP 3 I 5V

SSC Interface SSCLK 1 O 5V Connection for SPI Chips, Clock

SSDO 1 O 5V Connection for SPI Chips, Data_Out

SSDI 1 I 5V Connection for SPI Chips, Data_In

PLL + Clock Unit XTAL1_CLK 1 I

3.3V

Quartz connection / Clock supply

XTAL2 1 O

3.3V

Quartz connection

AVDD 1 Separate V

supply for PLL

AGND 1 Separate GND supply for PLL

XPLLEN 1 I 5V Switching off the PLL and supply clock pulse via

XTAL1_CLK

CLKOUT1X2 1 O 5V Clock pulse output CLK/2 (without reset)

CLKOUT1X4 1 O 5V Clock pulse output CLK/4 (without reset)

Physics Unit RTS_TXE 1 O

3.3V

TXD_TXS 1 O

3.3V

XCTS_RXA 1 I 5V

RXD_RXS 1 I 5V

General RESET 1 I 5V Reset Input

Test NTEST1 1 I 5V Test Pin

NTEST2 1 I 5V Test Pin

TST1 1 I 5V Test Pin

Supply VDD 4 +3.3V

GND 9 0V

Total 100

Figure 2.4-1:

DPC31 Pin List

Because of the 5V-tolerant I/O, and in order to ensure the least possible power loss, no pull-up or pull-down

resistors are integrated in the pad cells; that is, all unused inputs or all output ports (since these are switched

as input after reset) are to be applied to one defined level (Ports A, B, D, E, F, G, and H). This is not

necessary for Port C since it is permanently configured as output. A bus contention is permitted for a

maximum of 20ns.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 93 94

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