Intel 8XC196MC Benutzerhandbuch

4-13

MEMORY PARTITIONS

4.2.1

Selecting a Window

The window selection register (Figure 4-3) selects a window to be mapped into the top of the low-
er register file.

Table 4-9 provides a quick reference of WSR values for windowing the peripheral SFRs. Table
4-10 on page 4-14 lists the WSR values for windowing the upper register file.

WSR

Address:

Reset State:

0014H

00H

The window selection register (WSR) maps sections of RAM into the top of the lower register file, in
32-, 64-, or 128-byte increments. PUSHA saves this register on the stack and POPA restores it.

—

Bit

Number

Bit

Mnemonic

Function

—

Reserved; for compatibility with future devices, write zero to this bit.

6:0

W6:0

Window Selection

These bits specify the window size and number. See Table 4-9 on page
4-13 or Table 4-10 on page 4-14. See Table 4-9 for peripheral SFR windows
or Table 4-10 for upper register file windows.

Figure 4-3. Window Selection (WSR) Register

Table 4-9. Selecting a Window of Peripheral SFRs

Peripherals

WSR Value for

32-byte Window

(00E0–00FFH)

WSR Value for

64-byte Window

(00C0–00FFH)

WSR Value for

128-byte Window

(0080–00FFH)

Port 2
Waveform generator
Port 7 (MD only)

7EH

3FH

1FH

Peripheral interrupts
Pulse-width modulator
A/D converter
Frequency generator (MD only)
Reset control (MH only)

7DH

3EH

Port 1 (MH only)
Serial I/O port (MH only)

7CH

Timer 1–2
EPA compare 2–3 (MC)
EPA compare 0–5 (MD)
EPA compare 0–2 (MH)

7BH

3DH

1EH

EPA capture/compare 0–3 (MC)
EPA compare 0–1 (MC)
EPA capture/compare 0–5 (MD)
EPA capture/compare 0–1 (MH)
EPA compare 3 (MH)

7AH