Cypress CY7C63310 ユーザーズマニュアル

Document 38-08035 Rev. *K

Page 7 of 83

This family of microcontrollers is based on a high performance,

8-bit, Harvard architecture microprocessor. Five registers control

the primary operation of the CPU core. These registers are

affected by various instructions, but are not directly accessible

through the register space by the user. 

The 16-bit Program Counter Register (CPU_PC) allows direct

addressing of the full 8 Kbytes of program memory space.
The Accumulator Register (CPU_A) is the general purpose

register, which holds the results of instructions that specify any

of the source addressing modes.
The Index Register (CPU_X) holds an offset value that is used

in the indexed addressing modes. Typically, this is used to

address a block of data within the data memory space.

The Stack Pointer Register (CPU_SP) holds the address of the

current top of the stack

 

in the data memory space. It is affected

by the PUSH, POP, LCALL, CALL, RETI, and RET instructions,

which manage the software stack. It is also affected by the SWAP

and ADD instructions.
The Flag Register (CPU_F) has three status bits: Zero Flag bit

[1]; Carry Flag bit [2]; Supervisory State bit [3]. The Global

Interrupt Enable bit [0] globally enables or disables interrupts.

The user cannot manipulate the Supervisory State status bit [3].

The flags are affected by arithmetic, logic, and shift operations.

The manner in which each flag is changed is dependent upon

the instruction being executed, such as AND, OR, XOR, and

others. See 

2

4

4

3

8

2

6

P0.5/TIO0 GPIO Port 0 bit 5. Configured individually

Alternate function Timer capture inputs or Timer 

output TIO0

1

3

3

2

7

1

5

P0.6/TIO1 GPIO Port 0 bit 6. Configured individually

Alternate function Timer capture inputs or Timer 

output TIO1

32

2

2

1

6

P0.7

. Configured individually

Not present in the 16 pin PDIP or SOIC package

10

1

1

NC

11

12

24

NC

12

NC

17

NC

19

NC

27

NC

28

NC

29

NC

30

NC

31

NC

16

16

15

12

17

11

15

Vcc

13

13

12

9

14

8

12

V

SS

 (continued)

Flags

CPU_F

Program Counter 

CPU_PC

Accumulator

CPU_A

Stack Pointer

CPU_SP

Index

CPU_X