STPCI01 STMicroelectronics, STPCI01 Datasheet - Page 33

• Manufacturer Part Number: STPCI01
• Description: STPC INDUSTRIAL - PC COMPATIBLE EMBEDED MICROPROC
• Manufacturer: STMicroelectronics

3.1.4. STRAP REGISTER 3
Bits 7-0 of this register reflect the status of pins MD[47:40] respectively.
Strap3
Bit Number Sampled
7
Bits 7-6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Rsv
6
This register defaults to the values sampled on MD[47:40] pins after reset
Mnemonic
MD45
MD44
MD43
MD42
MD41
MD40
Rsv
MD45
5
Issue 2.4 - February 11, 2002
Access = 0022h/0023h
Description
Reserved.
UART2 internal or external. This bit reflects the value sampled on
MD[45] pin and controls the UART2 I/F as follows:
Setting to ’0’, UART2 is external.
Setting to ’1’, UART2 is internal.
UART1 internal or external and additional TFT outputs. This bit reflects
the value sampled on MD[44] pin and controls the UART1 I/F and the
additional TFT I/F as follows:
Setting to ’0’, UART1 is external and an additional 6 TFT outputs (lowest
bits - 2 red, 2 green and 2 blue) are enabled.
Setting to ’1’, UART1 is internal.
Parallel Port internal or external. This bit reflects the value sampled on
MD[43] pin and controls the Parallel Port I/F as follows:
Setting to ’0’, the Parallel Port is external.
Setting to ’1’, the Parallel Port is internal.
KB/Mouse internal or external. This bit reflects the value sampled on
MD[42] pin and controls the KB/Mouse controller I/F as follows:
Setting to ’0’, the KB/Mouse controller is external.
Setting to ’1’, the KB/Mouse controller is internal.
Local Bus I/F or ISA I/F. This bit reflects the value sampled on MD[41]
pin and sets whether the Local Bus I/F or the ISA I/F is available at the
device I/F as follows:
Setting to ’0’, selects the ISA I/F.
Setting to ’1’, selects the Local Bus I/F.
PCMCIA I/F or PCI I/F. This bit reflects the value sampled on MD[40]
pin and sets whether the PCMCIA I/F or the PCI I/F is available at the
device I/F as follows:
Setting to ’0’, selects the PCI I/F.
Setting to ’1’, selects the PCMCIA I/F.
MD44
4
MD43
3
MD42
2
MD41
1
STRAP OPTION
Regoffset = 03Ch
MD40
0
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