It has a built-in 32.768 kHz quartz resonator, and provides clock and calendar registers for year, month, day, day-of-week, hours, minutes and seconds, with 12-hour/24-hour selection, plus automatic leap-year correction with software selection for local calendars, and an additional periodic reference signal output.
TQS-939EA-7R on stock| Pin | Function | Pin | Function |
| AO-A9 | Address Inputs | WE | Read/Write Enable |
| AO-A9 | Refresh Address Inputs | OE | Output Enable |
| I/01-I/04 | Data Input / Data Output | Vcc | Power (+5V) |
| RAS | Row Address Strobe | Vss | Ground |
| CAS | Column Address Strobe | | |
| | | |
| < < |
| J f" + | | | |
| + r6 | l6 | 6 | | See H'guri |
| ~~ | | 4 ---- | % a 2 | l | ) }24 to | 48 | -- | -- for detals |
| 4 | | LE1 | | Column-t Interconr, |
| | |
| 4 | | LE2 -l | Column |
| | LE3 | | | i Interconn |
| | |
| 4 | | | §7 | 16 |
| | |
| 4 | | LE4 | | |
| 4 | | LE5 |
| | |
| 4 | | LE6 |
| | |
| 4 | | LE7 |
| |
| | | LE8 | d |
| Carry-Out & | | CaficndP-Oijt | 8 v\/\ < | + l < | J f" + |
| | + r6 | l6 See H'guri | 6 |
| |
| | | | | | | | | | |
