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// license:GPL-2.0+
// copyright-holders:Couriersud
/*
* nld_74393.cpp
*
* DM74393: Dual 4-Stage Binary Counter
*
* +--------------+
* /CP |1 ++ 14| VCC
* MR |2 13| /CP
* Q0 |3 12| MR
* Q1 |4 74393 11| Q0
* Q2 |5 10| Q1
* Q3 |6 9| Q2
* GND |7 8| Q3
* +--------------+
*
* Naming conventions follow Motorola datasheet
*
*/
#include "nld_74393.h"
#include "nl_base.h"
namespace netlist
{
namespace devices
{
static constexpr const unsigned MAXCNT = 15;
NETLIB_OBJECT(74393)
{
NETLIB_CONSTRUCTOR(74393)
, m_CP(*this, "CP", NETLIB_DELEGATE(cp))
, m_MR(*this, "MR", NETLIB_DELEGATE(mr))
, m_Q(*this, {"Q0", "Q1", "Q2", "Q3"})
, m_cnt(*this, "m_cnt", 0)
, m_cp(*this, "m_cp", 0)
, m_mr(*this, "m_mr", 0)
, m_power_pins(*this)
{
}
private:
NETLIB_RESETI()
{
m_CP.set_state(logic_t::STATE_INP_HL);
m_cnt = 0;
}
NETLIB_HANDLERI(mr)
{
if (!m_MR())
{
m_CP.activate_hl();
}
else
{
m_CP.inactivate();
if (m_cnt != 0)
{
m_cnt = 0;
m_Q.push(0, NLTIME_FROM_NS(24));
}
}
}
NETLIB_HANDLERI(cp)
{
auto cnt = (m_cnt + 1) & MAXCNT;
m_cnt = cnt;
m_Q[0].push((cnt >> 0) & 1, NLTIME_FROM_NS(13));
m_Q[1].push((cnt >> 1) & 1, NLTIME_FROM_NS(22));
m_Q[2].push((cnt >> 2) & 1, NLTIME_FROM_NS(31));
m_Q[3].push((cnt >> 3) & 1, NLTIME_FROM_NS(40));
}
logic_input_t m_CP;
logic_input_t m_MR;
object_array_t<logic_output_t, 4> m_Q;
state_var<unsigned> m_cnt;
state_var_sig m_cp;
state_var_sig m_mr;
nld_power_pins m_power_pins;
};
NETLIB_DEVICE_IMPL(74393, "TTL_74393", "+CP,+MR,@VCC,@GND")
} //namespace devices
} // namespace netlist
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