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Memory Models
PHYTEC Meßtechnik GmbH 2002 L-527e_8
37
Example a)
ADDRESEL1:
0406h = address range 04:0000h - 07:FFFFh
(256 kByte RAM bank on U2/U3)
ADDRESEL2:
0800h = address range 08:0000h - 08:0FFFh
(4 kByte address space for ext. UART)
ADDRESEL3
: 0816h = address range 08:1000h – 0C:FFFFh
(256 kByte free I/O area)
ADDRESEL4
1
: 0C16h = address range 0C:1000h - 10:0FFFh
(256 kByte free I/O area)
BUSCON0:
04AFh:
bus active for /CS0 (Flash bank U1)
BUSCON1:
04AFh:
bus active for /CS1 (RAM bank U2/3)
BUSCON2:
042Fh:
bus active for /CS2 (ext. UART)
BUSCON3
1
:
068Fh:
bus active for /CS3 (free I/O)
BUSCON4
1
:
068Ch:
bus active for /CS4 (free I/O)
BUSCON0-2:
for all 55 ns memory devices (0 wait states, read/write delay, no
tristate, short ALE, 16-bit demultiplexed)
BUSCON3,4:
for free I/O area (3 wait states, read/write delay, tristate wait
300 ns, long ALE, 16-bit demultiplexed)
Example b)
ADDRESEL1:
0006h = address range 00:0000h - 03:FFFFh
(256 kByte RAM bank on U2/3)
ADDRESEL2:
0806h = address range 08:0000h - 08:0FFFh
(4 kByte address space for external UART)
ADDRESEL3
1
: 0816h = address range 08:1000h – 0C:0FFFh
(256 kByte free I/O)
ADDRESEL4
1
: 0C16h = address range 0C:1000h - 10:0FFFh
(256 kByte free I/O)
BUSCON0:
04AFh: bus active for /CS0 (Flash bank U1)
BUSCON1:
04AFh: bus active for /CS1 (RAM bank U2/3)
BUSCON2:
042Fh:
bus active for /CS2 (external UART)
BUSCON3
1
:
068Ch:
bus active for /CS3 (free I/O)
BUSCON4
1
:
068Ch:
bus active for /CS4 (free I/O)
BUSCON0-2:
for all 55 ns memory devices active (0 wait states, read/write de-
lay, no tristate, short ALE, 16-bit demultiplexed)
BUSCON3,4:
for free I/O area (3 wait states, read/write delay, tristate, long
ALE, 16-bit demultiplexed)
1
:
/CS3 and /CS4 are not active in the standard configuration of the phyCORE-167CR/167CS.
In order to use these signals, resistors R24 and R25 must be removed (refer to section 4.1).
Содержание phyCORE-167CR
Страница 10: ...phyCORE 167CR 167CS PHYTEC Me technik GmbH 2002 L 527e_8...
Страница 24: ...phyCORE 167CR 167CS 14 PHYTEC Me technik GmbH 2002 L 527e_8...
Страница 40: ...phyCORE 167CR 167CS 30 PHYTEC Me technik GmbH 2002 L 527e_8...
Страница 50: ...phyCORE 167CR 167CS 40 PHYTEC Me technik GmbH 2002 L 527e_8...
Страница 102: ...phyCORE 167CR 167CS 92 PHYTEC Me technik GmbH 2002 L 527e_8...
Страница 112: ...phyCORE 167CR 167CS 102 PHYTEC Me technik GmbH 2002 L 527e_8...
Страница 114: ...Published by PHYTEC Me technik GmbH 2002 Ordering No L 527e_8 Printed in Germany...