Ktx Hardware Registers; Appendix Preview - Allen-Bradley 1784-KTX Reference Manual

Appendix Preview

Offset from Mnemonic
base address
:800h keys_read_reg
:801h host_to_ktx_int_reg
:802h assert_reg
:803h deassert_reg
:804h status_reg
:805h key_0_write_reg
:807h key_1_write_reg
:808h host_ack_of_ktx_int_reg
:80Ah card_control_write_reg
:80Ch card_control_read_reg
Allen-Bradley Parts

KTx Hardware Registers

This table describes the KTx hardware registers.
E/ISA access Description
16 bit Read only See description of M16 test.
Write A write of any value generates an interrupt to the KTx.
Write A write of any value asserts (enables) the KTx microprocessor.
Write A write of any value deasserts (disables) the KTx microprocessor.
Read Bit 0: Interrupt Pending. When set, indicates the KTx interrupted the host.
Bits 1-4: Undefined
Bit 5: Mode816. When clear, the KTx is operating in 16-bit mode; when set
the KTx is operating in 8-bit mode.
Bit 6: Halt. When clear, the KTx microprocessor is halted.
Bit 7: Reset. When clear, the KTx microprocessor is in the Reset state.
Write See description of M16 test.
Write See description of M16 test.
Write A write of any value clears the Interrupt Pending bit (bit 0) of the KTx
status register.
Write Bit 0: Interrupt mode
When clear, the KTx generates pulsed interrupts.
When set, the KTx generates EISA level interrupts.
Bit 1: M16 mode
When clear, the KTx operates in extended 16 bit mode.
When set, the KTx operates in standard 16 bit mode.
See chapter 2 for a detailed description.
Bits 2-7: Undefined
Read Bits 0-4: Undefined
Bit 5: LED Blink. When set, the LED will blink if on.
Bit 6: LED Color. When clear, the LED is green if on.
When set, the LED is red if on.
Bit 7: LED On. When set, the LED is on.
Appendix
C
C-1