ATtiny5 datasheet(103/168 Pages) ATMEL

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8127C–AVR–10/09

ATtiny4/5/9/10

14.5.2

SST - Serial STore to data space using indirect addressing

The SST instruction uses indirect addressing to store into data space the byte that is shifted into

the physical layer shift register. The data space location is pointed by the Pointer Register (PR),

where the address must have been stored before the operation. The Pointer Register can be

either left unchanged by the operation, or it can be post-incremented, as shown in Table 14-3.

14.5.3

SSTPR - Serial STore to Pointer Register

The SSTPR instruction stores the data byte that is shifted into the physical layer shift register to

the Pointer Register (PR). The address bit of the instruction specifies which byte of the Pointer

14.5.4

SIN - Serial IN from i/o space using direct addressing

The SIN instruction loads data byte from the I/O space to the shift register of the physical layer

for serial read-out. The instuction uses direct addressing, the address consisting of the 6

address bits of the instruction, as shown in Table 14-5.

14.5.5

SOUT - Serial OUT to i/o space using direct addressing

The SOUT instruction stores the data byte that is shifted into the physical layer shift register to

the I/O space. The instruction uses direct addressing, the address consisting of the 6 address

bits of the instruction, as shown in Table 14-6.

Table 14-3.

The Serial Store to Data Space (SLD) Instruction

Operation

Opcode

Remarks

DS[PR]

← data

0110 0000

← PR

Unchanged

DS[PR]

← data

0110 0100

← PR + 1

Post increment

Table 14-4.

The Serial Store to Pointer Register (SSTPR) Instruction

Operation

Opcode

Remarks

PR[a]

← data

0110 100a

Bit ‘a’ addresses Pointer Register byte

Table 14-5.

The Serial IN from i/o space (SIN) Instruction

Operation

Opcode

Remarks

data

← I/O[a]

0aa1 aaaa

Bits marked ‘a’ form the direct, 6-bit addres

Table 14-6.

The Serial OUT to i/o space (SOUT) Instruction

Operation

Opcode

Remarks

I/O[a]

← data

1aa1 aaaa

Bits marked ‘a’ form the direct, 6-bit addres

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