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eZ80L92 Development Kit

User Manual

Operational Description UM012913-0407

General-Purpose Port

The general-purpose port is emulated using GPIO Output Control

inputs. If this bit is 0, all the lines on the general-purpose port are

configured as outputs. Table 7 lists the multiple functions of the register.

The GPIO Data Register receives inputs or provides outputs for each of

the seven general-purpose port lines, depending on the configuration of

the port. See Table 8.

Table 6. LED and Port Emulation Addresses

Address Register Function Access

800000h LED Anode/General-Purpose Port

Output Control

800001h LED Cathode/Modem/Trig WR

800002h General-Purpose Port Data RD/WR

Table 7. LED Anode/General-Purpose Port Output Control Register

Function

Bit No.

76543210

Anode Col 1 X

Anode Col 2 X

Anode Col 3 X

Anode Col 4 X

Anode Col 5 X

Anode Col 6 X

GPIO Output X

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 85 86

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