bbc_micro_keyboard

Files
file	bbc_micro_keyboard.cdl
	BBC microcomputer keyboard module.

Detailed Description

Modules

module bbc_micro_keyboard::bbc_micro_keyboard	(	clock	clk,
		input bit	reset_n,
		output bit	reset_out_n,
		input bit	keyboard_enable_n,
		input bit	column_select[4],
		input bit	row_select[3],
		output bit	key_in_column_pressed,
		output bit	selected_key_pressed,
		input t_bbc_keyboard	bbc_keyboard
	)

Parameters

[out]	reset_out_n	From the Break key
[in]	keyboard_enable_n	Asserted to make keyboard detection operate
[in]	column_select	Wired to pa[4;0], and indicates which column of the keyboard matrix to access
[in]	row_select	Wired to pa[3;4], and indicates which row of the keyboard matrix to access
[out]	key_in_column_pressed	Wired to CA2, asserted if keyboard_enable_n and a key is pressed in the specified column (other than row 0)
[out]	selected_key_pressed	Asserted if keyboard_enable_n is asserted and the selected key is pressed