ST10F276Z5 STMicroelectronics, ST10F276Z5 Datasheet - Page 233
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ST10F276Z5
Manufacturer Part Number
ST10F276Z5
Description
16-BIT MICROCONTROLLER WITH MAC UNIT, UP TO 832 KBYTES FLASH MEMORY AND UP TO 68 KBYTES RAM
Manufacturer
STMicroelectronics
Datasheet
1.ST10F276Z5.pdf
(239 pages)
Specifications of ST10F276Z5
Single Voltage Supply
5V ±10% (embedded regulator for 1.8 V core supply)
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ST10F276Z5
24.1.6
However, in certain cases, the PWRDN instruction is not ignored, no further instructions are
fetched from external memory, and the CPU is in a quasi-idle state. This problem only
occurs in the following situations:
1.
2.
Note: The on-chip peripherals, such as the watchdog timer, still operate properly. If the
No problem occurs and the device normally enters Power-down mode if the NMI pin is held
low (PWDCFG = 0) or if all Port 2 pins used to exit from Power-down mode are at inactive
level (PWDCFG = 1).
Workaround
To prevent this problem from occurring, the PWRDN instruction must be preceded by
instructions performing write operations to external memory area or to an XPeripheral.
Otherwise, it is recommended to insert a NOP instruction before PWRDN.
When using a multiplexed bus with memory tri-state wait state, the PWRDN instruction must
be executed from internal RAM or XRAM.
Behavior of CAPCOM outputs in COMPARE mode 3
Description
When a CAPCOM channel is configured in compare mode 3, then the related output level
switches to high when the allocated timer, Tx, matches the related CAPCOM register, CCy.
When an overflow occurs on the CAPCOM timer Tx, it is reloaded with TxREL content and
the output pin is cleared. The output pin level does not change if TxREL and CCy have the
same value.
The related CAPCOM output stays low when the CAPCOM channel is configured in
compare mode 3 and TxREL and Tx related timer registers are loaded with the same value
as CCy. This is obtained by executing the following instructions:
MOV TxREL, #CCy value x =0,1,7,8
MOV Tx, #CCy value x = 0,1,7,8
MOV TxxCON, #data or bfldl/bfldh TxxCON , #mask, #data i.e. an
access is made to the T01CON or T78CON register.
The instructions following the PWRDN instruction are located in an external memory
and a multiplexed bus configuration with memory tri-state waitstate (bit MTTCx = 0) is
used.
The instruction preceding the PWRDN instruction writes to the external memory or to
an XPeripheral (such as XRAM or CAN) and the instructions following the PWRDN
instruction are located in external memory area. In this case, the problem occurs for all
bus configurations.
watchdog timer is not disabled, it resets the device upon an overflow event. However,
interrupts and PEC transfers cannot be processed. Power-down mode is entered if
the NMI signal is asserted low while the device is in this quasi-idle state.
Known limitations
233/239
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