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ST10F269 数据表(PDF) 130 Page - STMicroelectronics |
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ST10F269 数据表(HTML) 130 Page - STMicroelectronics |
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130 / 160 page  ST10F269 130/160 When both CAN are disabled via XPERCON setting, then any access in the address range 00’EE00h - 00’EFFFh will be directed to external memory interface, using the BUSCONx register corresponding to address matching ADDRSELx register. P4.4 and P4.7 can be used as General Purpose I/O when CAN2 is not enabled, and P4.5 and P4.6 can be used as General Purpose I/O when CAN1 is not enabled. The default XPER selection after Reset is identical to XBUS configuration of ST10C167: XCAN1 is enabled, XCAN2 is disabled, XRAM1 (2K Byte compatible XRAM) is enabled, XRAM2 (new 8K Byte XRAM) is disabled. Register XPERCON cannot be changed after the global enabling of XPeripherals, i.e. after setting of bit XPEN in SYSCON register. In EMUlation mode, all the XPERipherals are enabled (XPERCON bit are all set). When the Real Time Clock is disabled (RTCEN = 0), the clock oscillator is switch off if ST10 enters in power-down mode. Otherwise, when the Real Time Clock is enabled, the bit RTCOFF of the RTCCON register allows to choose the power-down mode of the clock oscillator. |
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