ST7FLCD1 datasheet(16/95 Pages) STMICROELECTRONICS

部件名	ST7FLCD1

功能描述	8-bit MCU for LCD Monitors with 60 KBytes Flash,2 KBytes RAM, 2 DDC Ports and Infrared Controller

PDF	95 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

16 / 95 page

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.

No half carry has occurred.

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

111

Accumulator

X Index Register

Y Index Register

Stack Pointer

Condition Code Register

Program Counter

11H I

N Z

Reset Value = Reset Vector @ FFFEh-FFFFh

PCH

PCL

Reset Value = Stack Higher Address

Reset Value =

11X 1X X

Reset Value = XXh

X = Undefined Value

ST7FLCD1 数据表(PDF) 16 Page - STMicroelectronics

ST7FLCD1 数据表(HTML) 16 Page - STMicroelectronics

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