SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 71

• Manufacturer Part Number: SAF-C161U-LF V1.3
• Description: IC MCU ISDN 16BIT TTL TQFP-100
• Manufacturer: Infineon Technologies
• Series: C16xxr

Specifications of SAF-C161U-LF V1.3

• Core Processor: C166
• Core Size: 16-Bit
• Speed: 36MHz
• Connectivity: EBI/EMI, SPI, UART/USART, USB
• Peripherals: POR, PWM, WDT
• Number Of I /o: 56
• Program Memory Type: ROMless
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: SAFC161ULFV1.3X; SAFC161ULFV13XP; SP000007502

For Boolean bit operations with two operands the V-flag represents the logical ORing of
the two specified bits.
Table 10
• Z-Flag: The Z-flag is normally set to '1', if the result of an ALU operation equals zero,
• E-Flag: The E-flag can be altered by instructions, which perform ALU or data
• MULIP-Flag: The MULIP-flag will be set to '1' by hardware upon the entrance into an
Note: The MULIP flag is a part of the task environment! When the interrupting service
Data Sheet
C-Flag
0
0
1
1
otherwise it is cleared.
For the addition and subtraction with carry the Z-flag is only set to '1', if the Z-flag
already contains a '1' and the result of the current ALU operation additionally equals
zero. This mechanism is provided for the support of multiple precision calculations.
For Boolean bit operations with only one operand the Z-flag represents the logical
negation of the previous state of the specified bit. For Boolean bit operations with two
operands the Z-flag represents the logical NORing of the two specified bits. For the
prioritize ALU operation the Z-flag indicates, if the second operand was zero or not.
movement operations. The E-flag is cleared by those instructions which cannot be
reasonably used for table search operations. In all other cases the E-flag is set
depending on the value of the source operand to signify whether the end of a search
table is reached or not. If the value of the source operand of an instruction equals the
lowest negative number, which is representable by the data format of the
corresponding instruction ('8000
type), the E-flag is set to '1', otherwise it is cleared.
interrupt service routine, when a multiply or divide ALU operation was interrupted
before completion. Depending on the state of the MULIP bit, the hardware decides
whether a multiplication or division must be continued or not after the end of an
interrupt service. The MULIP bit is overwritten with the contents of the stacked MULIP-
flag when the return-from-interrupt-instruction (RETI) is executed. This normally
means that the MULIP-flag is cleared again after that.
routine does not return to the interrupted multiply/divide instruction (ie. in case of
a task scheduler that switches between independent tasks), the MULIP flag must
be saved as part of the task environment and must be updated accordingly for the
new task before this task is entered.
Shift Right Rounding Error Evaluation
V-Flag
0
1
0
1
-
0 <
Rounding Error Quantity
H
' for the word data type, or '80
No rounding error
Rounding error
Rounding error
Rounding error
71
-
< 1/2 LSB
= 1/2 LSB
> 1/2 LSB
Central Processor Unit
H
' for the byte data
2001-04-19
C161U