Features: · Supports Windows 95 Plug-and-Play
· Supports 2 Serial / 1 Parallel / FDC / RTC / KB / PS/2 Mouse functions
· Supports 22 General Purpose I/O pins
- 3 GPIO ports (Ports 1, 2, 3)
- 5 GPIO-ALT function pins for Remote Control (Pins 30-34)
- 2 General Purpose chip select pins (Pins 24-25)
- Supports I2C Control Pins
· 2.88 MB Floppy Disk Controller
- Software compatible with 82077 and supports 16-byte data FIFOs
- High performance internal data separator
- Supports standard 1 Mbps / 500 Kbps / 300 Kbps / 250 Kbps data rate
- Supports 3 modes of 3.5" FDD (720K/1.2M/1.44MB)
- Swappable drives A and B
· Supports FDC through Parallel Port pins
· Supports AT PS/2 KB and PS/2 Mouse
· Built-in Keyboard Controller and Real Time Clock
·Various modes of Parallel Port Supports ECP/ EPP / PS/2 / SPP and 1284 Compliance
- IBM PC/XT, PC/AT and PS/2 compatible Bi-directional parallel port
- Enhanced Parallel Port (EPP) compatible
- Microsoft and Hewlett Packard Extended Capabilities Port (ECP) compatible
·Serial ports
- Two high performance 16550 compatible UARTs with send/receive 16-byte FIFOs
- Serial Infra Red (SIR) for wireless communications
- MIDI (Musical Instrument Digital Interface) compatible
· High performance Power Management for FDC, UART and Parallel Port
· Supports XD-To-SD Bus Buffer and Control Pins
· Supports Enable/Disable KBC and RTC
· Supports Fast Gate A20 and RC function
· Supports External KBC programming pin functions
· Supports additional IrDA and ASK IR Pins
·Supports Phoenix KBC (M5123), AMI KBC(M5125)
·160-pin PQFP packagePinout
Specifications
|
Item |
Ratings |
Supply voltage VDD
Operating supply voltage |
-0.5V to +7V
4.5V to 5.5V |
All input and output
voltages with respect to VSS |
-0.5V to VCC +0.5V |
| Storage temperature range (TSTG) |
-65 to 150 |
| Operating temperature (TA) |
0 to 70 |
| Package power dissipation (PD) |
750 mW |
Lead temperature (TL)
(soldering, 10 seconds) |
260 |
| |VCC - VCCA| |
0.6V |
| ESD tolerance (CZAP) |
100 pF |
DescriptionThe Acer Labs' M512x chip has two full-function universal asynchronous receiver/ transmitters (UARTs), a keyboard interface, real time clock, a floppy disk controller (FDC) with data separator, parallel port, standard XT/AT address decoding for on-chip functions, and a configuration register. It offers a single-chip solution to the most common IBM PC, XT, AT and Notebook peripherals.
The floppy disk controller M512x is fully compatible with the industry-standard 765A and 82077SL architecture. It includes more advanced options such as a high performance data separator, extended track range to 4096, high performance power management, implied seek command, scan command, and supports both IBM and ISO 360K/1.2M/720K/1.44M/2.88M FDD formats. The UARTs are compatible with either the INS8250N-B, NS16450 and 16550. It has complete compatibility with the IBM AT's parallel port. The configuration register is one-byte wide and can be programmed via hardware or software. By controlling this register, the user can assign standard AT addresses and disable any major on-chip function (e.g., the FDC, either UART, or the parallel port) independent of the others. This allows for flexibility in system configuration when adapter boards contain duplicate functions.
The M512x provides support for the ISA Plug-and-Play standard and recommended functionality to support Windows ' 95. Through internal configuration registers, each of the M512x' s logic device' s I/O address, DMA channel and IRQ channel may be programmed. There are 96 I/O address location options, 13 IRQ options, and three DMA channel options for each logical device except KBC and RTC. KBC' s I/O address is not routable. RTC' s I/O
address and IRQ are not routable as well.
M5123 Data Sheet
