ST72561J9-Auto STMicroelectronics, ST72561J9-Auto Datasheet - Page 37

• Manufacturer Part Number: ST72561J9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72561J9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years at 55 °C
• 5 Power Saving Modes: halt, auto wake up from halt, active halt, wait and slow

ST72561-Auto
4.3.4
Figure 8.
Condition code register (CC)
Read/ write
Reset value: 111x1xxx
The 8-bit Condition Code register contains the interrupt masks and four flags representative
of the result of the instruction just executed. This register can also be handled by the PUSH
and POP instructions.
These bits can be individually tested and/or controlled by specific instructions.
Arithmetic management bits
Bit 4 = H Half carry.
This bit is set by hardware when a carry occurs between bits 3 and 4 of the ALU during an
ADD or ADC instructions. It is reset by hardware during the same instructions.
This bit is tested using the JRH or JRNH instruction. The H bit is useful in BCD arithmetic
subroutines.
Bit 2 = N Negative.
This bit is set and cleared by hardware. It is representative of the result sign of the last
arithmetic, logical or data manipulation. It’s a copy of the result 7
0: No half carry has occurred.
1: A half carry has occurred.
0: The result of the last operation is positive or null.
1: The result of the last operation is negative (that is, the most significant bit
is a logic 1).
RESET VALUE = STACK HIGHER ADDRESS
RESET VALUE = RESET VECTOR @ FFFEh-FFFFh
15
15
7
1
RESET VALUE = 1
CPU registers
PCH
1
8
8 7
RESET VALUE = XXh
RESET VALUE = XXh
RESET VALUE = XXh
7
7
7
7
1
7
1 1 X 1 X X
1 I1 H I0 N Z
I1
Doc ID 12370 Rev 8
PCL
H
0
0
0
X
0
0
C
0
X INDEX REGISTER
Y INDEX REGISTER
ACCUMULATOR
PROGRAM COUNTER
CONDITION CODE REGISTER
STACK POINTER
I0
N
th
Central processing unit
bit.
X = Undefined Value
Z
C
0
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