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型號(hào)：	S80C32-40SHXXX:RD
廠商：	TEMIC SEMICONDUCTORS
元件分類：	微控制器/微處理器
英文描述：	8-BIT, 40 MHz, MICROCONTROLLER, PQCC44
文件頁(yè)數(shù)：	6/1021頁(yè)
文件大?。?/td>	15196K

32072H–AVR32–10/2012

AT32UC3A3

PCONTROL.CHxRES is non-functional

PCONTROL.CHxRES is non-functional. Counters are reset at power-on, and cannot be

reset by software.

Fix/Workaround

Software needs to keep history of performance counters.

Transfer error will stall a transmit peripheral handshake interface

If a transfer error is encountered on a channel transmitting to a peripheral, the peripheral

handshake of the active channel will stall and the PDCA will not do any more transfers on

the affected peripheral handshake interface.

Fix/Workaround

Disable and then enable the peripheral after the transfer error.

URAD (Unspecified Register Access Detection Status) does not detect read accesses

to the write-only KEYW[5..8]R registers

Fix/Workaround

In the PRAS and PRBS registers, the MxPR fields are only two bits

In the PRAS and PRBS registers, the MxPR fields are only two bits wide, instead of four bits.

The unused bits are undefined when reading the registers.

Fix/Workaround

Mask undefined bits when reading PRAS and PRBS.

TWIM SR.IDLE goes high immediately when NAK is received

When a NAK is received and there is a non-zero number of bytes to be transmitted,

SR.IDLE goes high immediately and does not wait for the STOP condition to be sent. This

does not cause any problem just by itself, but can cause a problem if software waits for

SR.IDLE to go high and then immediately disables the TWIM by writing a one to CR.MDIS.

Disabling the TWIM causes the TWCK and TWD pins to go high immediately, so the STOP

condition will not be transmitted correctly.

Fix/Workaround

If possible, do not disable the TWIM. If it is absolutely necessary to disable the TWIM, there

must be a software delay of at least two TWCK periods between the detection of

SR.IDLE==1 and the disabling of the TWIM.

TWIM TWALM polarity is wrong

The TWALM signal in the TWIM is active high instead of active low.

Fix/Workaround

Use an external inverter to invert the signal going into the TWIM. When using both TWIM

and TWIS on the same pins, the TWALM cannot be used.

SMBALERT bit may be set after reset

The SMBus Alert (SMBALERT) bit in the Status Register (SR) might be erroneously set after

system reset.

Fix/Workaround

After system reset, clear the SR.SMBALERT bit before commencing any TWI transfer.

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
S80C32-42	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S80C32-42R	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S80C32-44	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S80C32-44R	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S80C32-L16	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller

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