ST18952 datasheet(20/67 Pages) STMICROELECTRONICS

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ST18952

XER0/1: X-memory space control registers

After reset, XER0/1 default values are 0x83EF/0x83FF

YER0/1: Y-memory space control registers

After reset, YER0/1 default values are 0x83EF/0x83FFI

IER0/1: Instruction memory control registers

After reset, IER0/1 default values are 0x83EF/0x83FF or 0xC3EF/0xC3FF

(the EN_I value depends on the IDT_EN input value

9876

EN_X

XA15 XA14 XA13 XA12 XA11 XA10

Bit

Function

W3:0

Wait state count (1 to 16) for off-chip access (X-memory space)

XA15:10

X-memory space map for boundary on-chip or off-chip

EN_X

Enable for X-space data exchanges

Intel/Motorola

0: Motorola type for memories

1: Intel type for memories (default)

EN_Y

YA15 YA14 YA13 YA12 YA11 YA10

Bit

Function

W3:0

Wait state count (1 to 16) for off-chip access (Y-memory space)

YA15:10

Y-memory space map for boundary on-chip or off-chip

EN_Y

Enable for Y-space data exchanges

Intel/Motorola

0: Motorola type for memories

1: Intel type for memories (default)

9876543210

EN_I

----

IA15 IA14 IA13 IA12 IA11 IA10

Bit

Function

W3:0

Wait state count (1 to 16) for off-chip access (I-memory space)

IA15:10

I-memory space map for boundary on-chip or off-chip

EN_I

Enable for I-space data exchanges

Intel/Motorola

0: Motorola type for memories

1: Intel type for memories (default)

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