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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(); }
+
+ DECLARE_READ8_MEMBER(read);
+ DECLARE_WRITE8_MEMBER(write);
+
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
+
+private:
+ // callbacks
+ devcb_write_line m_eoc_cb;
+ devcb_write_line m_eoc_ff_cb;
+ devcb_read16 m_in_cb[8];
+
+ 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