LANCAM A/L series (not recommended for new designs)

Operational Characteristics

10

Rev. 1

Notes:

1.

Default Command Write cycle destination (does not require a TCO instruction).

2.

Default Command Write cycle destination (no TCO instruction required) if Address Field flag was set in bit 11 of the instruction loaded in the

previous cycle.

3.

Loaded or read on the Command Write or Read cycle immediately following a TCO instruction. Active for one Command Write or Read cycle only.

NFA register can not be loaded this way.

4.

Default Command Read cycle source (does not require a TCO instruction).

5.

Default Command Read cycle source (does not require a TCO instruction) if the previous cycle was a Command Read of Status Register Bits 15–0.

If next cycle is not a Command Read cycle, any subsequent Command Read cycle accesses the Status Register Bits 15–0.

6.

Default persistent source and destination on power-up and after Reset. If other resources were sources or destinations, SPD CR or SPS CR restores

the Comparand register as the destination or source.

7.

Selected by executing a Select Persistent Destination instruction.

8.

Selected by executing a Select Persistent Source instruction.

9.

Access may require multiple 16-bit Read or Write cycles. The Segment Control register controls the selection of the desired 16-bit segment(s) by

establishing the Segment counters’ start and end limits and count values.

10.

Device is deselected if Device Select register setting does not equal Page Address register setting, unless the Device Select Register is set to

FFFFH, which allows only write access to the device. (Writes to the Device Select register are always active.) Device may also be deselected under

locked daisy chain conditions as shown in Table 4.

11.

A Command Read cycle after a TCO PS or TCO PD reads back the Instruction decoder bits that were last set to select a persistent source or

destination. The TCO PS instruction also reads back the Device ID.

Table 2: Input/Output Operations

Cycle Type

/E

/C

M

/

W

I/O Status

SPS

SPD

TC

O

Operation

Notes

Cmd Write

L

L

L

IN

IN

IN

IN

IN

IN

IN

3

3

3

3

3

Load Instruction decoder

Load Address register

Load Control register

Load Page Address register

Load Segment Control register

Load Device Select register

Deselected

1

2,3

3

3

3

3

10

Cmd Read

L

L

H

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUT

HIGH-Z

3

3

3

3

3

3

3

Read Next Free Address register

Read Address register

Read Status Register bits 15–0

Read Status Register bits 31–16

Read Control register

Read Page Address register

Read Segment Control register

Read Device Select register

Read Current Persistent Source or Destination

Deselected

3

3

4

5

3

3

3

3

3,11

10

Data Write

L

H

L

IN

IN

IN

IN

IN

IN

IN

3

3

3

3

3

3

Load Comparand register

Load Mask Register 1

Load Mask Register 2

Write Memory Array at address

Write Memory Array at Next Free address

Write Memory Array at Highest-Priority match

Deselected

6,9

7,9

7,9

7,9

7,9

7,9

10

Data Read

L

H

H

OUT

OUT

OUT

OUT

OUT

HIGH-Z

3

3

3

3

3

Read Comparand register

Read Mask Register 1

Read Mask Register 2

Read Memory Array at address

Read Memory Array at Highest-Priority match

Deselected

6, 9

8, 9

8, 9

8, 9

7, 8

10

H

X

X

HIGH-Z

Deselected