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H8S/2218 数据表(PDF) 410 Page - Renesas Technology Corp |
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H8S/2218 数据表(HTML) 410 Page - Renesas Technology Corp |
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410 / 750 page  Section 11 Realtime Clock (RTC) Rev.6.00 Jun. 03, 2008 Page 362 of 698 REJ09B0074-0600 Table 11.3 Operating State in Each Mode Function High- Speed Medium- Speed Sleep Module Stop Watch Subactive Subsleep Software Standby Hard-ware Standby Clock operation Subclock operation Subclock operation Subclock operation Halted (Retained) Subclock operation Subclock operation Subclock operation Subclock operation Halted (Reset) Free running timer operation Operating Operating Operating Halted (Retained) Halted (Retained) Halted (Retained) Halted (Retained) Halted (Retained) Halted (Reset) 11.7 Usage Notes (1) Notes on Using the Emulator In the E6000 emulator the RTC module is mounted on an external extended board. Since it must be accessed as an external module, the limitations listed below apply. These limitations do not apply to the E10A or to product chips. • RTC operation is not supported in the H8S/2218 Group's mode 7 (single-chip mode). • When using the RTC module in the H8S/2218 Group's mode 6 (on-chip ROM-enabled mode) or the H8S/2212 Group's mode 7 (single-chip mode), A7 to A0 are input pins in the initial status. Therefore, A7 to A0 must be set as output pins by setting PC7DDR to PC0DDR to H'FF before accessing the RTC module. • The above setting is not necessary when using the RTC module in the H8S/2218 Group's modes 4 and 5 (on-chip ROM-disabled mode) because A7 to A0 are output pins. (2) Bus Interface The bus interface of the module conforms to the bus specifications for external area 7. Consequently, before accessing the RTC module, area 7 must be specified as having an 8-bit bus width and 3-state access using the bus controller register. (3) Method for Reading Pin States Using the Port D Register (PORTD) First access EXMDLSTP or the RTC register (address range: H'FFFF40 to H'FFFF5F). Then, you must perform a dummy read to the external address space (such as H'FFEF00 to H'FF7FF) outside the range H'FFFF40 to H'FFFF5F before reading PORTD. |
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