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// license: BSD-3-Clause
// copyright-holders: Dirk Best
/***************************************************************************
µPD7004
10-bit 8 Channel A/D Converter
___ ___
CH4 1 |* u | 28 CH3
CH5 2 | | 27 CH2
CH6 3 | | 26 CH1
CH7 4 | | 25 CH0
VREF 5 | | 24 AGND
DGND 6 | | 23 AVDD
DB7/SO 7 | | 22 CS
DB6/SI 8 | | 21 RD/SCKI
DB5/SHIFT 9 | | 20 A0
DB4/SCKO 10 | | 19 WR/STB
DB3/SOEN 11 | | 18 MC
DB2/CODE 12 | | 17 CLOCK
DB1/DEV1 13 | | 16 EOC
DB0/DEV0 14 |_______| 15 DVDD
***************************************************************************/
#ifndef MAME_DEVICES_MACHINE_UPD7004_H
#define MAME_DEVICES_MACHINE_UPD7004_H
#pragma once
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class upd7004_device : public device_t
{
public:
// construction/destruction
upd7004_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto eoc_callback() { return m_eoc_cb.bind(); }
auto eoc_ff_callback() { return m_eoc_ff_cb.bind(); }
template <int N> auto in_callback() { return m_in_cb[N].bind(); }
uint8_t read(offs_t offset);
void write(offs_t offset, uint8_t data);
// device-level overrides
virtual void device_start() override;
TIMER_CALLBACK_MEMBER(update_state);
private:
// callbacks
devcb_write_line m_eoc_cb;
devcb_write_line m_eoc_ff_cb;
devcb_read16::array<8> m_in_cb;
enum state : int
{
STATE_IDLE,
STATE_CONVERSION_START,
STATE_CONVERSION_DONE
};
state m_state;
emu_timer *m_cycle_timer;
// state
int m_div;
bool m_code;
int m_address;
uint16_t m_sar;
};
// device type definition
DECLARE_DEVICE_TYPE(UPD7004, upd7004_device)
#endif // MAME_DEVICES_MACHINE_UPD7004_H
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