Cypress enCoRe CY7C602xx Manual de usuario descargar pdf (Pagina 9)

CY7C601xx, CY7C602xx

Document 38-16016 Rev. *E Page 9 of 68

9.1.1 Accumulator Register

9.1.2 Index Register

9.1.3 Stack Pointer Register

9.1.4 CPU Program Counter High Register

9.1.5 CPU Program Counter Low Register

Table 9-2. CPU Accumulator Register (CPU_A)

Bit # 7 6 5 4 3 2 1 0

Field CPU Accumulator [7:0]

Read/Write ––––––––

Default 00000000

Bit [7:0]: CPU Accumulator [7:0]

8-bit data value holds the result of any logical or arithmetic instruction that uses a source addressing mode.

Table 9-3. CPU X Register (CPU_X)

Bit # 7 6 5 4 3 2 1 0

Field X [7:0]

Read/Write ––––––––

Default 00000000

Bit [7:0]: X [7:0]

8-bit data value holds an index for any instruction that uses an indexed addressing mode.

Table 9-4. CPU Stack Pointer Register (CPU_SP)

Bit # 7 6 5 4 3 2 1 0

Field Stack Pointer [7:0]

Read/Write ––––––––

Default 00000000

Bit [7:0]: Stack Pointer [7:0]

8-bit data value holds a pointer to the current top-of-stack.

Table 9-5. CPU Program Counter High Register (CPU_PCH)

Bit # 7 6 5 4 3 2 1 0

Field Program Counter [15:8]

Read/Write ––––––––

Default 00000000

Bit [7:0]: Program Counter [15:8]

8-bit data value holds the higher byte of the program counter.

Table 9-6. CPU Program Counter Low Register (CPU_PCL)

Bit # 7 6 5 4 3 2 1 0

Field Program Counter [7:0]

Read/Write ––––––––

Default 00000000

Bit [7:0]: Program Counter [7:0]

8-bit data value holds the lower byte of the program counter.

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Cypress enCoRe CY7C602xx Manual de usuario Pagina 9

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