CM120 C-Media Electronics, Inc., CM120 Datasheet - Page 3

• Manufacturer Part Number: CM120
• Description: Usb 7-in-1 Combo Card Reader Controller
• Manufacturer: C-Media Electronics, Inc.

1.DESCRIPTION AND OVERVIEW
Date: 09/09/2003
Overview
CM120 is a USB 1.1 full speed 7-in-1 controller for Combo Card Reader, applicable for major
MB / NB chipsets of Intel, VIA, Ali, and SIS. CM120 is suitable for PC2001-compliant desktops,
notebook computers, and any other platforms with USB host controller port.
Plug and Play
CM120 provides friendly plug and play function, and by using the select pin the power can be
switched between usb bus power (500mA) or self power (100mA). It only takes one 12MHz
crystal input to provide provides internal 48MHz PLL frequency for USB system operation. It
is a popular purpose USB interface reader/writer controllers which integrates PLL, embedded
data buffer and high performance engine. It comprises SPI (HID) mode to external MCU and 16
bits GPIO for user-friendliness.
7-in-1 Card Interface
CM120 comprises six mainstream card interfaces: Compact Flash Card (CF) / Microdrive,
Smart Media Card (SM) / eXtreme Digital Card (xD) , Multi Media Card (MMC) / Secure Digital
Card (SD) and Memory Stick Card (MS).
Cost-effectiveness
As to the cost concern, CM120 integrates the processor and embedded data buffer. In that
regard, it does not need any external memory module or others bom materials .
Features
USB 1.1 Full Speed
Compliant with USB Storage device class specifications
Compliant with USB HID device specification v1.0
Fixed USB full speed mode 12Mbits/s
Uses 3 sets Endpoint control, two bulk pipes, and one control pipe
USB bus power and self power capability. Low power consumption
Internal PLL, need only 12MHz crystal to provide 48MHz frequency
Fully Support Compact Flash (CF) card / Microdrive card interface
Fully Support Smart Media (SM) /
Fully Support Multi Media card (MMC) / Secure Digital card (SD) interface
Fully Support Memory Stick card (MS) interface
Capable of preventing inappropriate card plug-out via the utilization of time out
mechanism
Support SPI mode interface
Support 5 kinds of LED display for USB/CF/SD/SM/MS to indicate operation status
Support 16 bits general purpose input and output
Available 100 QFP package.
eXtreme Digital (xD)
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USB 7-in-1 Combo Card Reader Controller
card interface
Version: 1.3
CM120