1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
// license:BSD-3-Clause
// copyright-holders:R. Belmont
/**********************************************************************
Intersil/Renesas ICM7170 Real Time Clock
**********************************************************************
PDIP package:
_____ _____
_WR 1 | \_/ | 24 _RD
ALE 2 | | 23 VDD
_CS 3 | | 22 D7
A4 4 | ICM7170 | 21 D6
A3 5 | | 20 D5
A2 6 | | 19 D4
A1 7 | | 18 D3
A0 8 | | 17 D2
OSC OUT 9 | | 16 D1
OSC IN 10 | | 15 D0
INT SOURCE 11 | | 14 VBACKUP
/INTERRUPT 12 |_____________| 13 VSS (GND)
SOIC package:
_____ _____
A1 1 | \_/ | 24 A2
A0 2 | | 23 A3
OSC OUT 3 | | 22 A4
OSC IN 4 | ICM7170 | 21 _CS
INT SOURCE 5 | | 20 ALE
/INTERRUPT 6 | | 19 _WR
VSS 7 | | 18 _RD
VBACKUP 8 | | 17 VDD
D0 9 | | 16 D7
D1 10 | | 15 D6
D2 11 | | 14 D5
D3 12 |_____________| 13 D4
**********************************************************************/
#ifndef MAME_MACHINE_ICM7170_H
#define MAME_MACHINE_ICM7170_H
#pragma once
#include "dirtc.h"
class icm7170_device : public device_t,
public device_rtc_interface,
public device_nvram_interface
{
public:
// construction/destruction
icm7170_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
auto irq() { return m_out_irq_cb.bind(); }
uint8_t read(offs_t offset);
void write(offs_t offset, uint8_t data);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// device_rtc_interface overrides
virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second) override;
// device_nvram_interface overrides
virtual void nvram_default() override;
virtual bool nvram_read(util::read_stream &file) override;
virtual bool nvram_write(util::write_stream &file) override;
TIMER_CALLBACK_MEMBER(clock_tick);
private:
void recalc_irqs();
devcb_write_line m_out_irq_cb;
bool m_out_irq_state;
uint8_t m_regs[0x20];
uint8_t m_irq_mask, m_irq_status;
emu_timer *m_timer;
};
DECLARE_DEVICE_TYPE(ICM7170, icm7170_device)
#endif // MAME_MACHINE_ICM7170_H
|