Advanced Technology Attachment Controller (ATA)
MCF5253 Reference Manual, Rev. 1
Freescale Semiconductor
23-19
•
Little endian, 16-bit or 32-bit register:
— bits [7:0]: byte 0
— bits [15:8]: byte 1
— bits [23:8]: byte 2
— bits [31:24]: byte 3
•
Big endian, 32-bit register:
— bits [31:24]: byte 0
— bits [23:16]: byte 1
— bits [15:8]: byte 2
— bits [7:0]: byte 3
•
Big endian, 16-bit register:
— bits [15:8]: byte 0
— bits [7:0]: byte 1
23.5.2.2
Timing Registers
Registers (at$0) till (at $17) contain timing parameters. These timing parameters control
the timing on the ATA bus as shown in details in the following illustrations:
•
Section 23.4.3.2, “PIO Mode Timing
”
•
Section 23.4.3.3, “Timing in Multiword DMA Mode
”
•
Section 23.4.3.4, “UDMA In Timing Diagrams”
•
Section 23.4.3.5, “UDMA Out Timing Diagrams
Every timing parameter is 8-bit wide and can assume valid values between 1 and 255. Reset value is
always 1.
All figures in this section show timing registers.
23.5.2.2.1
TIME_OFF Register
for illustration of valid bits in the TIME_OFF Register and
for description of
the bit fields.
23.5.2.2.2
TIME_ON Register
for illustration of valid bits in the TIME_ON Register and
for description of
the bit fields.
Address MBAR2 + 0x800 (TIME_OFF)
Access: User read/write
7
6
5
4
3
2
1
0
R
TIME_OFF[7:0]
W
Reset
0
0
0
0
0
0
0
1
Figure 23-12. TIME_OFF Register
Summary of Contents for MCF5253
Page 1: ...Document Number MCF5253RM Rev 1 08 2008 MCF5253 Reference Manual...
Page 26: ...MCF5253 Reference Manual Rev 1 xxvi Freescale Semiconductor...
Page 32: ...MCF5253 Reference Manual Rev 1 xxxii Freescale Semiconductor...
Page 46: ...MCF5253 Introduction MCF5253 Reference Manual Rev 1 1 14 Freescale Semiconductor...
Page 62: ...Signal Description MCF5253 Reference Manual Rev 1 2 16 Freescale Semiconductor...
Page 98: ...Instruction Cache MCF5253 Reference Manual Rev 1 5 10 Freescale Semiconductor...
Page 104: ...Static RAM SRAM MCF5253 Reference Manual Rev 1 6 6 Freescale Semiconductor...
Page 128: ...Synchronous DRAM Controller Module MCF5253 Reference Manual Rev 1 7 24 Freescale Semiconductor...
Page 144: ...Bus Operation MCF5253 Reference Manual Rev 1 8 16 Freescale Semiconductor...
Page 176: ...System Integration Module SIM MCF5253 Reference Manual Rev 1 9 32 Freescale Semiconductor...
Page 198: ...Analog to Digital Converter ADC MCF5253 Reference Manual Rev 1 12 6 Freescale Semiconductor...
Page 246: ...DMA Controller MCF5253 Reference Manual Rev 1 14 18 Freescale Semiconductor...
Page 282: ...UART Modules MCF5253 Reference Manual Rev 1 15 36 Freescale Semiconductor...
Page 344: ...Audio Interface Module AIM MCF5253 Reference Manual Rev 1 17 46 Freescale Semiconductor...
Page 362: ...I2 C Modules MCF5253 Reference Manual Rev 1 18 18 Freescale Semiconductor...
Page 370: ...Boot ROM MCF5253 Reference Manual Rev 1 19 8 Freescale Semiconductor...
