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UPD703108 Datasheet(PDF) 74 Page - NEC

No. de pieza UPD703108
Descripción Electrónicos  32-Bit Single-Chip Microcontrollers
Download  99 Pages
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Fabricante Electrónico  NEC [NEC]
Página de inicio  http://www.nec.com/
Logo NEC - NEC

UPD703108 Datasheet(HTML) 74 Page - NEC

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CHAPTER 5 APPLICATION EXAMPLES
Application Note U17121EJ1V1AN
74
/////////////////////////////////////////////////////////////////////////
// Function name: PCI_HBM_Init
//
// Function: Initializes PCI Host Bridge Macro.
//
// Argument: None
//
// Return value: None
//
// Remark: Base addresses of this initialization sample are as follows.//
//
- Base address of PCI I/O space:
0C80_0000H
//
//
- Base address of PCI memory space: 0CC0_0000H
//
//
- Base address on PCI bus memory space in which
//
//
main memory (SDRAM) is mapped:
0400_0000H
//
//
- Range of PCI bus memory space in which
//
//
main memory (SDRAM) is mapped:
03FF_FFFFH
//
//
Other settings are required according to system
//
//
requirements and mounting.
//
/////////////////////////////////////////////////////////////////////////
void PCI_HBM_Init(void)
{
V850EME2_REGW(PHBMR_PCI_CONTROL) = 0x07000110;
// PCI_CONTROL register
//
bit 31-24:
PCI_PARKCNT = 1
//
(Set time for shifting to bus parking to 7)
//
bit 15-08:
PCI_REQ = 1
(Enable I_REQ_B0)
//
bit
4:
PCI_RESET bit = 1 (Release PCI bus reset)
V850EME2_REGW(PHBMR_PCI_IO_BASE) = BASE_ADDRESS_PCI_IO;
// PCI_IO_BASE register
//
Set PCI I/O space base address to C800000H.
V850EME2_REGW(PHBMR_PCI_MEM_BASE) = BASE_ADDRESS_PCI_MEM;
// PCI_MEM_BASE register
//
Set PCI memory space base address to CC00000H.
V850EME2_REGW(PHBMR_PCI_CONTROL) = 0x07000113;
// PCI_CONTROL register
//
bit 31-24:
PCI_PARKCNT = 1
//
(Set time for shifting to bus parking to 7)
//
bit 15-08:
PCI_REQ = 1
(Enable I_REQ_B0)
//
bit
4:
PCI_RESET bit = 1
(Release PCI bus reset)
//
bit
1:
PCI_MEM_EN bit = 1
//
(Enable access from CPU to PCI memory area)
//
bit
0:
PCI_IO_EN bit = 1
//
(Enable access from CPU to PCI I/O area)
V850EME2_REGW(PHBMR_SYSTEM_MEM_BASE) = BASE_ADDRESS_SDRAM;
// SYSTEM_MEM_BASE register
//
Set base address on PCI bus memory space in which main
//
memory (SDRAM) is mapped to 4000000H.


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