SPMCK16Z4MPV16 datasheet(392/500 Pages) FREESCALE

392 / 500 page

M68HC16 Z SERIES

D-18

USER’S MANUAL

Each chip-select pin has an associated base address register. A base address is the

lowest address in the block of addresses enabled by a chip select. CSBARBT contains

the base address for selection of a boot memory device. Bit and field definitions for

CSBARBT and CSBAR[0:10] are the same, but reset block sizes differ. These regis-

ters may be read or written at any time.

ADDR[23:11] — Base Address

This field sets the starting address of a particular chip-select’s address space. The ad-

dress compare logic uses only the most significant bits to match an address within a

block. The value of the base address must be an integer multiple of the block size.

Base address register diagrams show how base register bits correspond to address

lines.

BLKSZ[2:0] — Block Size Field

This field determines the size of the block that is enabled by the chip-select.

Table D-12 shows bit encoding for the base address registers block size field.

D.2.20 Chip-Select Option Register Boot

D.2.21 Chip-Select Option Registers

Table D-12 Block Size Field Bit Encoding

BLKSZ[2:0]

Block Size

Address Lines Compared1

NOTES:

1. ADDR[23:20] are the same logic level as ADDR19 during

normal operation.

000

2 Kbytes

ADDR[23:11]

001

8 Kbytes

ADDR[23:13]

010

16 Kbytes

ADDR[23:14]

011

64 Kbytes

ADDR[23:16]

100

128 Kbytes

ADDR[23:17]

101

256 Kbytes

ADDR[23:18]

110

512 Kbytes

ADDR[23:19]

111

512 Kbytes

ADDR[23:20]

CSORBT — Chip-Select Option Register Boot

$YFFA4A

MODE

BYTE[1:0]

R/W[1:0]

STRB

DSACK[3:0]

SPACE[1:0]

IPL[2:0]

AVEC

RESET:

CSOR[0:10] — Chip-Select Option Registers

$YFFA4E–YFFA76

MODE

BYTE[1:0]

R/W[1:0]

STRB

DSACK[3:0]

SPACE[1:0]

IPL[2:0]

AVEC

RESET:

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

SPMCK16Z4MPV16 Datasheet(PDF) 392 Page - Freescale Semiconductor, Inc

SPMCK16Z4MPV16 Datasheet(HTML) 392 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL