CONTENTS
6.4.1 Initialization ....................................................................................................... 6-3
6.5 Interrupts ......................................................................................................................... 6-6
6.6 Control Registers ............................................................................................................ 6-6
Px Port Data Register ................................................................................................................ 6-6
Px Port Enable Register ............................................................................................................ 6-7
6.7.1 P0 Port Group .................................................................................................. 6-11
6.7.2 P1 Port Group .................................................................................................. 6-12
6.7.3 P2 Port Group .................................................................................................. 6-13
6.7.4 P3 Port Group .................................................................................................. 6-14
6.7.5 P4 Port Group .................................................................................................. 6-15
6.7.6 P5 Port Group .................................................................................................. 6-16
6.7.7 P6 Port Group .................................................................................................. 6-17
6.7.8 P7 Port Group .................................................................................................. 6-18
6.7.9 P8 Port Group .................................................................................................. 6-19
6.7.10 Pd Port Group ................................................................................................ 6-20
7.1 Overview ......................................................................................................................... 7-1
7.3 Control Registers ............................................................................................................ 7-2
8 Watchdog Timer (WDT) ................................................................................................8-1
8.1 Overview ......................................................................................................................... 8-1
8.2 Clock Settings ................................................................................................................. 8-1
8.3 Operations ...................................................................................................................... 8-2
8.3.1 WDT Control ..................................................................................................... 8-2
8.4 Control Registers ............................................................................................................ 8-3
WDT Clock Control Register ..................................................................................................... 8-3
WDT Control Register ............................................................................................................... 8-3
9 Real-Time Clock (RTCA) ..............................................................................................9-1
9.1 Overview ......................................................................................................................... 9-1
9.2.1 Output Pin ......................................................................................................... 9-1
9.3 Clock Settings ................................................................................................................. 9-2
9.4 Operations ...................................................................................................................... 9-3
9.4.1 RTCA Control ................................................................................................... 9-3
iv
Seiko Epson Corporation
S1C17W18 TECHNICAL MANUAL
(Rev. 1.2)