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參數(shù)資料
| 型號(hào)： | CL-PS7110 |
| 廠商： | Cirrus Logic, Inc. |
| 英文描述： | Low-Power System-on-a-Chip |
| 中文描述： | 低功耗系統(tǒng)級(jí)晶片 |
| 文件頁數(shù)： | 18/82頁 |
| 文件大小： | 1101K |
| 代理商： | CL-PS7110 |
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DATA BOOK v1.5
May 1997
18
FUNCTIONAL DESCRIPTION
CL-PS7110
Low-Power System-on-a-Chip
Figure 1-4
shows the usage of such memory segments.
Figure 1-4. Memory Segment Usage
The width of each the ROM/expansion bank is set in its Memory Configuration Register 1 (see
Section 3.2.13
). This register is cleared to zero by a power-on reset. The CL-PS7110 boots from
ROM/expansion bank 0. To allow for booting from 8- or 32-bit memory devices, the state of port E bit 0 is
sampled during power-on reset and stored into the BOOT8BIT Mode register. If this bit is low, all zeros in
the width field of a memory configuration register indicates a 32-bit-wide bank and all ones a 8-bit device.
If this bit is high, the decoding of the bus width field is inverted, so all zeros indicates a 8-bit device.This
way, a pull-up or pull-down on port E bit 0 indicates the size of the boot device. For consistency, the
BOOT8BIT Mode has the same effect on all ROM/expansion banks.
The PCMCIA mode is a special case. If the width field of the Memory Configuration Register 1 is set to
PCMCIA mode, the upper address bits are decoded to determine the bus width and type of access. The
PCMCIA address bits A0 to A25 are driven by CL-PS7110 address bits A0 to A25. CL-PS7110 address
bits A26 and A27 are decoded to specify the type and width of the access. If both are zeros, it is an access
to the 8-bit-wide attribute memory. If only A26 is a one, it is an access to the 16-bit-wide common memory.
If only A27 is a one, it is an access to a 8-bit-wide I/O register. If both are ones, it is an access to a 16-bit-
wide I/O register.
The ARM710A core only supports byte or word accesses. Normally, word accesses are converted to mul-
tiple bus cycles that match the width of the ROM/expansion bank. Word accesses to PCMCIA 16-bit-wide
CL-PS7110
D[0:31]
A[0:27]
×
16
FLASH
×
16
ROM
×
16
FLASH
×
16
ROM
EXTERNAL MEMORY
MAPPED EXPANSION
BUFFERS
BUFFERS
AND
LATCHES
NMWE
NCS0
NCS1
CS6
CS7
NCS2
NCS3
ADDITIONAL I/O
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CL-PS7110-VC-A | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Low-Power System-on-a-Chip |
| CL-PS7110-VI-A | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Low-Power System-on-a-Chip |
| CL-PS7111 | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Low-Power System-on-a-Chip |
| CL-PS7111(208LQFP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Logic IC |
| CL-PS7111(256PBGA) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Logic IC |
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