Rev. 1.00, 05/04, page 396 of 544
15.4 Operation
15.4.1
Host Interface Activation
The host interface is activated by setting one of bits LPC3E to LPC1E in HICR0 to 1 in single-
chip mode. When the host interface is activated, the related I/O ports (ports 37 to 30, ports 83 and
82) function as dedicated host interface input/output pins. In addition, setting the FGA20E, PMEE,
LSMIE, and LSCIE bits to 1 adds the related I/O ports (ports 81 and 80, ports B0 and B1) to the
host interface's input/output pins.
Use the following procedure to activate the host interface after a reset release.
1. Read the signal line status and confirm that the LPC module can be connected. Also check that
the LPC module is initialized internally.
2. When using channel 3, set LADR3 to determine the channel 3 I/O address and whether
bidirectional data registers are to be used.
3. Set the enable bit (LPC3E to LPC1E) for the channel to be used.
4. Set the enable bits (GA20E, PMEE, LSMIE, and LSCIE) for the additional functions to be
used.
5. Set the selection bits for other functions (SDWNE, IEDIR).
6. As a precaution, clear the interrupt flags (LRST, SDWN, ABRT, OBF). Read IDR or TWR15
to clear IBF.
7. Set interrupt enable bits (IBFIE3 to IBFIE1, ERRIE) as necessary.
Summary of Contents for H8S/2111B
Page 2: ...Rev 1 00 05 04 page ii of xxxiv...
Page 8: ...Rev 1 00 05 04 page viii of xxxiv...
Page 22: ...Rev 1 00 05 04 page xxii of xxxiv...
Page 30: ...Rev 1 00 05 04 page xxx of xxxiv...
Page 84: ...Rev 1 00 05 04 page 50 of 544...
Page 100: ...Rev 1 00 05 04 page 66 of 544...
Page 126: ...Rev 1 00 05 04 page 92 of 544...
Page 180: ...Rev 1 00 05 04 page 146 of 544...
Page 216: ...Rev 1 00 05 04 page 182 of 544...
Page 254: ...Rev 1 00 05 04 page 220 of 544...
Page 268: ...Rev 1 00 05 04 page 234 of 544...
Page 382: ...Rev 1 00 05 04 page 348 of 544...
Page 462: ...Rev 1 00 05 04 page 428 of 544...
Page 464: ...Rev 1 00 05 04 page 430 of 544...
Page 488: ...Rev 1 00 05 04 page 454 of 544...
Page 496: ...Rev 1 00 05 04 page 462 of 544...
Page 574: ...Rev 1 00 05 04 page 540 of 544...
Page 581: ......
Page 582: ...H8S 2111B Hardware Manual...