CONTENTS
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
iii
8.3.1 Operating Clock Control .....................................................................................8-4
8.3.2 RTC Initial Sequence .........................................................................................8-4
8.3.3 12/24-hour Mode and Counter Settings .............................................................8-5
8.3.4 Start/Stop and Software Reset ..........................................................................8-5
8.3.5 Counter Hold and Busy Flag ..............................................................................8-6
8.3.6 30-second Correction ........................................................................................8-7
8.3.7 Counter Read ....................................................................................................8-7
8.4 RTC Interrupts ..................................................................................................................8-8
8.5 WAKEUP and #STBY Pins ...............................................................................................8-9
8.6 Details of Control Registers ............................................................................................8-11
RTC Interrupt Status Register (RTC_INTSTAT) ....................................................................... 8-11
RTC Interrupt Mode Register (RTC_INTMODE) ...................................................................... 8-12
RTC Control 0 Register (RTC_CNTL0) .................................................................................... 8-13
RTC Control 1 Register (RTC_CNTL1) .................................................................................... 8-14
RTC Second Register (RTC_SEC) ........................................................................................... 8-15
RTC Minute Register (RTC_MIN) ............................................................................................. 8-15
RTC Hour Register (RTC_HOUR) ............................................................................................ 8-16
RTC Day Register (RTC_DAY) ................................................................................................. 8-16
RTC Month Register (RTC_MONTH) ....................................................................................... 8-17
RTC Year Register (RTC_YEAR) .............................................................................................. 8-17
RTC Days of Week Register (RTC_WEEK).............................................................................. 8-18
RTC Wakeup Configuration Register (RTC_WAKEUP)............................................................ 8-18
9.1 SRAMC Module Overview ...............................................................................................9-1
9.2 SRAMC Pins ....................................................................................................................9-1
9.3 SRAMC Operating Clock ..................................................................................................9-2
9.4 External Memory Areas ...................................................................................................9-2
9.5.1 Connecting External Devices .............................................................................9-5
9.5.2 Data Configuration in Memory ...........................................................................9-5
9.5.3 External Bus Operation ......................................................................................9-6
9.6.1 SRAM Read/Write Timing with No External #WAIT ...........................................9-7
9.6.2 SRAM Read/Write Timings with External #WAIT ...............................................9-9
#CE[7:4] Access Timing Configuration Register (SRAMC_TMG47) ........................................ 9-10
#CE[10:8]Access Timing Configuration Register (SRAMC_TMG810) ..................................... 9-11
#CE[10:4] Device Configuration Register (SRAMC_TYPE) ..................................................... 9-13
10.1 SDRAMC Module Overview ..........................................................................................10-1
10.2 SDRAMC Pins ...............................................................................................................10-1
10.3 SDRAM Clock and Double Frequency Mode ................................................................10-2
10.4 Configuration of SDRAM ...............................................................................................10-2
10.5.1 Initializing SDRAM ..........................................................................................10-7
10.5.2 SDRAM Commands........................................................................................10-9
10.5.3 SDRAM Bus Operations .................................................................................10-9