Miniature Card

From HwB

Developed by Intel.
Miniature Card is a memory-only expansion card.




UNKNOWN CONNECTOR at the device.



Pin Name Description Dir
1 A18 Address Bus Arrowl.png
2 A16 Address Bus Arrowl.png
3 A14 Address Bus Arrowl.png
4 Vccr Voltage Refresh Arrowl.png
5 CEH# Card Enable High Byte Arrowl.png
6 A11 Address Bus Arrowl.png
7 A9 Address Bus Arrowl.png
8 A8 Address Bus Arrowl.png
9 A6 Address Bus Arrowl.png
10 A5 Address Bus Arrowl.png
11 A3 Address Bus Arrowl.png
12 A2 Address Bus Arrowl.png
13 A0 Address Bus Arrowl.png
14 RAS# Row Address Strobe Arrowl.png
15 A24 Address Bus Arrowl.png
16 A23 Address Bus Arrowl.png
17 A22 Address Bus Arrowl.png
18 OE# Output Enable Arrowl.png
19 D15 Data Bus Arrowlr.png
20 D13 Data Bus Arrowlr.png
21 D12 Data Bus Arrowlr.png
22 D10 Data Bus Arrowlr.png
23 D9 Data Bus Arrowlr.png
24 D0 Data Bus Arrowlr.png
25 D2 Data Bus Arrowlr.png
26 D4 Data Bus Arrowlr.png
27 RFU Reserved for future use
28 D7 Data Bus Arrowlr.png
29 SDA Serial Data and Address Arrowlr.png
30 SCL Serial Clock Arrowl.png
31 A19 Address Bus Arrowl.png
32 A17 Address Bus Arrowl.png
33 A15 Address Bus Arrowl.png
34 A13 Address Bus Arrowl.png
35 A12 Address Bus Arrowl.png
36 RESET# Reset Arrowl.png
37 A10 Address Bus Arrowl.png
38 VS1# Voltage Sense 1 Arrowr.png
39 A7 Address Bus Arrowl.png
40 BS8# Bus Size 8 Arrowl.png
41 A4 Address Bus Arrowl.png
42 CEL# Card Enable Low Byte Arrowl.png
43 A1 Address Bus Arrowl.png
44 CASL# Column Address Strobe Low Byte Arrowl.png
45 CASH# Column Address Strobe High Byte Arrowl.png
46 CD# Card Detect Arrowr.png
47 A21 Address Bus Arrowl.png
48 BUSY# Ready/Busy Arrowr.png
49 WE# Write Enable Arrowl.png
50 D14 Data Bus Arrowlr.png
51 RFU Reserved for future use
52 D11 Data Bus Arrowlr.png
53 VS2# Voltage Sense 2 Arrowr.png
54 D8 Data Bus Arrowlr.png
55 D1 Data Bus Arrowlr.png
56 D3 Data Bus Arrowlr.png
57 D5 Data Bus Arrowlr.png
58 D6 Data Bus Arrowlr.png
59 RFU Reserved for future use
60 A20 Address Bus Arrowl.png

The following three is separate:

Name Description Dir
GND Ground
VCC Power
CINS# Card Insertion Arrowr.png

Note: Direction is card relative device.


This section is currently based solely on the Miniature Card specification v1.1.

Signal Descriptions:


Address A0 to A24 are the address bus lines that can address up to 32 Mwords (64 MBytes). The Miniature Card specification does not require the Miniature Card to decode the upper address lines. A 2 Mbyte Miniature Card that does not decode the upper address lines would repeat its address space every 2 Mbytes. Address 0h would access the same physical location as 200000h, 400000h, 600000h, etc.


Data lines D0 through D15 constitute the data bus. The data bus is composed of two bytes, the low byte D[7:0] and the high byte D[15:8].


OE# indicates that the current bus cycle is a read cycle.


WE# indicates that the current bus cycle is a write cycle.


Voltage Sense 1 signal. The card grounds this signal to indicate it can operate at 3.3 Volts. This signal must either be connected to card GND or left open.


Voltage Sense 2 signal. The card grounds this signal to indicate it can operate at x.x Volts (the value to be determined at a later date). This signal must either be connected to card GND or left open.


CEL# enables the low byte of the data bus (D[7:0]) on the card. This signal is not used in DRAM cards.


CEH# enables the high byte of the data bus (D[15:8]) on the card. This signal is not used in DRAM cards.


RAS# strobes in the row address for DRAM cards.


CASL# strobes in the low byte column address for DRAM cards.


CASH# strobes in the high byte column address for DRAM cards.


RESET# controls card initialization. When RESET# transitions from a low state to a high state, the Miniature Card must reset to a predetermined state.


BUSY# is a signal generated by the card to indicate the status of operations within the Miniature Card. When BUSY# is high, the Miniature Card is ready to accept the next command from the host. When BUSY# is low, the Miniature Card is busy and unable to accept some data operations from the host. For example, in Flash Miniature Cards the BUSY# signal is tied to the components RY/BY# signal. However, ROM Miniature Cards would always drive BUSY# high since the host will always be able to read from a ROM Miniature Card.


Vccr provides a low current (refresh) voltage supply. Vccr is a feature used by DRAM Miniature Cards to "self-refresh" during "sleep" mode.


I2C: Serial Data/Address.


I2C: Serial Clock are used to read the attribute information structure (AIS) from the serial EEPROM in a DRAM card.


CD# is a grounded interface signal. After a Miniature Card has been inserted, CD# will be forced low. The card detect signal is located in the center of the second row of interface signals, and should be one of the last interface signals to connect to the host. Do not confuse CD# with CINS#. CINS# is an early card detect that is one of the first signals to connect to the host.


BS8# is a signal driven by the host to indicate if the data bus is x8 or x16. An 8-bit host must drive BS8# low and tie the high byte data bus D[15:8] to the low byte data bus D[7:0]. A 16-bit host must drive this signal high.




Vcc is used to supply power to the card.


CINS# is a grounded signal on the front of the Miniature Card that can be used for early detection of a card insertion. CINS# makes contact on the host when the front of the card is inserted into the socket, before the interface signals connect.



  • Minicature Card v1.1 spec at Miniature Card Implementers Forum's homepage