mcf52258 Freescale Semiconductor, Inc, mcf52258 Datasheet - Page 32

• Manufacturer Part Number: mcf52258
• Description: Mcf52259 Coldfire Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Electrical Characteristics
2.10
The following timing specs are defined at the chip I/O pin and must be translated appropriately to arrive at timing
specs/constraints for the physical interface.
2.10.1
The following timing specs meet the requirements for MII and 7-Wire style interfaces for a range of transceiver devices.
32
1
In MII mode, n = 3
Num
E1
E2
E3
E4
—
Fast Ethernet Timing Specifications
Receive Signal Timing Specifications
MB_D[7:0] /
MB_A[19:X]
RXCLK frequency
RXD[n:0], RXDV, RXER to RXCLK setup
RXCLK to RXD[n:0], RXDV, RXER hold
RXCLK pulse width high
RXCLK pulse width low
MB_A[15:0]
MB_CLK
MB_R/W
MB_ALE
MB_CSn
MB_OE
Characteristic
MCF52259 ColdFire Microcontroller, Rev. 1
MB1
ADDRESS
Figure 6. Mini-FlexBus Write Timing
MB2
Table 16. Receive Signal Timing
1
1
MB3
MB2
A[19:X]
DATA[Y:0]
35%
35%
Min
—
5
5
MII Mode
MB3
65%
65%
Max
25
—
—
Freescale Semiconductor
RXCLK period
RXCLK period
MB2
MB3
MHz
Unit
ns
ns