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ST7FLCD1 Datasheet(PDF) 16 Page - STMicroelectronics

Part # ST7FLCD1
Description  8-bit MCU for LCD Monitors with 60 KBytes Flash,2 KBytes RAM, 2 DDC Ports and Infrared Controller
PDF  95 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7FLCD1 Datasheet(HTML) 16 Page - STMicroelectronics

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Central Processing Unit (CPU)
ST7FLCD1
16/95
CONDITION CODE REGISTER (CC)
Read/Write
Reset Value: 111x1XXX
The 8-bit Condition Code register contains the interrupt mask and four flags resulting from 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.
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 instruction. It is reset by hardware during the same instructions.
0:
No half carry has occurred.
1:
A half carry has occurred.
This bit is tested using the JRH or JRNH instruction. The H bit is useful in BCD arithmetic
subroutines.
Note:
Instruction Groups are defined in Table 5.
Figure 5: CPU Registers
7
0
111
H
I
N
Z
C
Accumulator
X Index Register
Y Index Register
Stack Pointer
Condition Code Register
Program Counter
70
1C
11H I
N Z
Reset Value = Reset Vector @ FFFEh-FFFFh
70
70
70
0
7
15
8
PCH
PCL
15
8
70
Reset Value = Stack Higher Address
Reset Value =
1X
11X 1X X
Reset Value = XXh
Reset Value = XXh
Reset Value = XXh
X = Undefined Value



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