| IC number: | 5C01A |
| IC function: | Real-time clock with internal RAM |
| Related components: | MSM6242B (RTC used in 16-bit Amigas) |
| IC number | Manufacturer | Documentation |
|---|---|---|
| 5C01A | | Not available |
| IC number | Package | CBM part number | CBM part description |
|---|---|---|---|
| RP5C01A | 18-pin DIP | 390525-01 | IC, Ricoh, Real Time Clock, RP5C01, DIP |
| RF5C01A | 18-pin SOP | 391557-01 | IC, Ricoh, RTC, RF5C01A, SM |
| Amiga | Position | Package |
|---|---|---|
| A3000 | U190 | DIP |
| A3000T | U190 | DIP |
| A4000 | U178 | DIP |
| A4000T | U180 | DIP |
| A1200 | U9 (not installed) | SOP |
| Pin | Type | Name | Signal name | |||
|---|---|---|---|---|---|---|
| A3000, A3000T | A4000 | A4000T | A1200 | |||
| 1 | Input | _CS | GND | GND via R181 | GND via R180D | _RTC_CS |
| 2 | Input | CS | _FAIL | _PWR_BAD | ||
| 3 | Input | ADJ | GND | GND via R917 | ||
| 4..7 | Input | A0..A3 | A2..A5 via U195 | A2..A5 via U177 | A2..A5 via U181 | A2..A5 |
| 8 | Input | _RD | _RTCR | _IORD | ||
| 9 | Power | GND | GND | |||
| 10 | Input | _WR | _RTCW | _IOWR | ||
| 11..14 | I/O | D0..D3 | D16..D19 | D0..D3 | ||
| 15 | Output | _ALARM | unused | |||
| 16 | Input | OSCIN | connected to Y190 | connected to Y176 | connected to Y180 | connected to Y9 |
| 17 | Output | OSCOUT | ||||
| 18 | Power | Vcc | connected to BT190 | connected to BT176 | connected to BT180 and CN180 | connected to BT9 |