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ST18D952

DIGITAL SIGNAL PROCESSOR (DSP) CHIP

STMicroelectronics 

ST18952

XER0/1: X-memory space control registers

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

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

IM EN_X - - - - XA15 XA14 XA13 XA12 XA11 XA10 W3 W2 W1 W0

Bit

W3:0

XA15:10

EN_X

IM

Function

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

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

Enable for X-space data exchanges

Intel/Motorola

0: Motorola type for memories

1: Intel type for memories (default)

YER0/1: Y-memory space control registers

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

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

IM EN_Y - - - - YA15 YA14 YA13 YA12 YA11 YA10 W3 W2 W1 W0

Bit

W3:0

YA15:10

EN_Y

IM

Function

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

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

Enable for Y-space data exchanges

Intel/Motorola

0: Motorola type for memories

1: Intel type for memories (default)

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

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

IM EN_I - - - - IA15 IA14 IA13 IA12 IA11 IA10 W3 W2 W1 W0

Bit

W3:0

IA15:10

EN_I

IM

Function

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

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

Enable for I-space data exchanges

Intel/Motorola

0: Motorola type for memories

1: Intel type for memories (default)

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