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// license:BSD-3-Clause
// copyright-holders:Couriersud
/*
* nld_74174.cpp
*
* DM74174: Hex D Flip-Flops with Clear
*
* +--------------+
* CLR |1 ++ 16| VCC
* Q1 |2 15| Q6
* D1 |3 14| D6
* D2 |4 74174 13| D5
* Q2 |5 12| Q5
* D3 |6 11| D4
* Q3 |7 10| Q4
* GND |8 9| CLK
* +--------------+
*
* +-----+-----+---++---+-----+
* | CLR | CLK | D || Q | QQ |
* +=====+=====+===++===+=====+
* | 0 | X | X || 0 | 1 |
* | 1 | R | 1 || 1 | 0 |
* | 1 | R | 0 || 0 | 1 |
* | 1 | 0 | X || Q0| Q0Q |
* +-----+-----+---++---+-----+
*
* Q0 The output logic level of Q before the indicated input conditions were established
*
* R: 0 -> 1
*
* Naming conventions follow National Semiconductor datasheet
*
*/
#include "nl_base.h"
namespace netlist::devices {
NETLIB_OBJECT(74174)
{
NETLIB_CONSTRUCTOR(74174)
, m_CLK(*this, "CLK", NETLIB_DELEGATE(clk))
, m_Q(*this, 1, "Q{}")
, m_clrq(*this, "m_clr", 0)
, m_data(*this, "m_data", 0)
, m_D(*this, 1, "D{}", NETLIB_DELEGATE(other))
, m_CLRQ(*this, "CLRQ", NETLIB_DELEGATE(clrq))
, m_power_pins(*this)
{
}
NETLIB_RESETI()
{
m_CLK.set_state(logic_t::STATE_INP_LH);
m_clrq = 0;
m_data = 0xFF;
}
private:
NETLIB_HANDLERI(clrq)
{
m_clrq = m_CLRQ();
if (!m_clrq)
{
m_data = 0;
m_Q.push(m_data, NLTIME_FROM_NS(40));
m_CLK.inactivate();
}
else
m_CLK.activate_lh();
}
NETLIB_HANDLERI(other)
{
m_data = m_D();
if (m_clrq)
m_CLK.activate_lh();
}
NETLIB_HANDLERI(clk)
{
if (m_clrq)
{
m_Q.push(m_data, NLTIME_FROM_NS(25));
m_CLK.inactivate();
}
}
logic_input_t m_CLK;
object_array_t<logic_output_t, 6> m_Q;
state_var<netlist_sig_t> m_clrq;
state_var<netlist_sig_t> m_data;
object_array_t<logic_input_t, 6> m_D;
logic_input_t m_CLRQ;
nld_power_pins m_power_pins;
};
NETLIB_DEVICE_IMPL(74174, "TTL_74174", "+CLK,+D1,+D2,+D3,+D4,+D5,+D6,+CLRQ,@VCC,@GND")
} // namespace netlist::devices
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