SH7721 datasheet(20/1524 Pages) RENESAS

20 / 1524 page

Rev. 3.00 Jan. 18, 2008 Page xx of lxii

17.3.11 Hour Alarm Register (RHRAR) ........................................................................... 571

17.3.12 Day of Week Alarm Register (RWKAR) ............................................................. 572

17.3.13 Date Alarm Register (RDAYAR)......................................................................... 573

17.3.14 Month Alarm Register (RMONAR) ..................................................................... 574

17.3.15 Year Alarm Register (RYRAR)............................................................................ 574

17.3.16 RTC Control Register 1 (RCR1)........................................................................... 575

17.3.17 RTC Control Register 2 (RCR2)........................................................................... 577

17.3.18 RTC Control Register 3 (RCR3)........................................................................... 579

17.4

Operation ........................................................................................................................... 580

17.4.1 Initial Settings of Registers after Power-On ......................................................... 580

17.4.2 Setting Time ......................................................................................................... 580

17.4.3 Reading Time........................................................................................................ 581

17.4.4 Alarm Function..................................................................................................... 582

17.5

Usage Notes ....................................................................................................................... 583

17.5.1 Register Writing during RTC Count..................................................................... 583

17.5.2 Use of Realtime Clock (RTC) Periodic Interrupts................................................ 583

17.5.3 Transition to Standby Mode after Setting Register............................................... 583

17.5.4 Crystal Oscillator Circuit ...................................................................................... 584

Section 18 Serial Communication Interface with FIFO (SCIF) .......................... 585

18.1

Features.............................................................................................................................. 585

18.2

Input/Output Pins ...............................................................................................................588

18.3

Register Descriptions ......................................................................................................... 589

18.3.1 Receive Shift Register (SCRSR) .......................................................................... 590

18.3.2 Receive FIFO Data Register (SCFRDR) .............................................................. 590

18.3.3 Transmit Shift Register (SCTSR) ......................................................................... 590

18.3.4 Transmit FIFO Data Register (SCFTDR)............................................................. 590

18.3.5 Serial Mode Register (SCSMR)............................................................................ 591

18.3.6 Serial Control Register (SCSCR).......................................................................... 595

18.3.7 FIFO Error Count Register (SCFER) ................................................................... 599

18.3.8 Serial Status Register (SCSSR) ............................................................................ 600

18.3.9 Bit Rate Register (SCBRR) .................................................................................. 607

18.3.10 FIFO Control Register (SCFCR) .......................................................................... 609

18.3.11 FIFO Data Count Register (SCFDR) .................................................................... 612

18.3.12 Transmit Data Stop Register (SCTDSR) .............................................................. 613

18.4

Operation ........................................................................................................................... 613

18.4.1 Asynchronous Mode ............................................................................................. 613

18.4.2 Serial Operation .................................................................................................... 614

18.4.3 Synchronous Mode ............................................................................................... 624

18.4.4 Serial Operation in Synchronous Mode ................................................................ 625

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