LPC47N227TQFP Standard Microsystems (SMSC), LPC47N227TQFP Datasheet - Page 154

• Manufacturer Part Number: LPC47N227TQFP
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LPC47N227TQFP

• Lead Free Status / RoHS Status: Not Compliant

CR16 can only be accessed in the configuration state and after the CSR has been initialized to 16H.
CR16 shadows the bits in the write-only UART2 run-time FCR register.
description.
CR17
CR17 can only be accessed in the configuration state and after the CSR has been initialized to 17H.
CR17 is the Force FDD Status Change register.
Note:
as well as to the Parallel Port FDC.
BIT NO.
3-7
0,1
2
The controls in the Force FDD Status Change register (CR17) apply to the FDD Interface pins
Force WRTPRT
Force DSKCHG
Type: R/W
BIT NAME
Reserved
0-1
Force FDD Status Change Register
Setting either of the Force Disk Change bits active (1) forces the
FDD nDSKCHG input active when the appropriate drive has been
selected. FORCE DSKCHG1 and FORCE DSKCHG0 can be
written to a 1 but are not clearable by software. FORCE
DSKCHG1 is cleared on (nSTEP AND nDS1), FORCE DSKCHG0
is cleared on (nSTEP AND nDS0). Note: The DSK CHG bit in the
Floppy DIR register, Bit 7 = (nDS0 AND FORCE DSKCHG0) OR
(nDS1 AND FORCE DSKCHG1) OR nDSKCHG.
Setting either of the Force Disk Change bits active (1) forces the
FDD nDSKCHG input active when the appropriate drive has been
selected.
Bit[0] Force Change for FDC0
0=Inactive
1=Active
Bit[1] Force Change for FDC1
0=Inactive
1=Active
FORCE WRTPRT asserts the internal nWRTPRT input to the
controller when the FORCE WRTPRT bit is active (“1”) and a
drive has been selected. The FORCE WRTPRT function applies
to the nWRTPRT pin in the FDD Interface as well as the
nWRTPRT pin in the Parallel Port FDC.
Read Only. A read returns 0.
Table 77 - CR17
154
DESCRIPTION
Default: 0x03 on VCC POR
See CR15 for register