z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 62

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS022006-0207
External Interface Timing
Table 14. External Interface Timing for a Write Operation - Normal Mode
Parameter
T
T
T
T
T
T
T
T
T
T
T
T
T
T
1
2
3
4
5
6
7
8
9
10
11
12
13
14
External Interface Write Timing - Normal Mode
The following sections describe the external interface timing.
Figure 11
performing a Write operation. In
generator is configured to provide 1 Wait state during Write operations. The external
WAIT input pin is generating an additional Wait period. Also in
assumed that the chip select (CS) signal has been configured for active Low operation.
Though the internal system clock is not provided as an external signal, it provides a useful
reference for control signal events. Note that at the completion of a Write cycle, the
de-assertion of the WR signal is fed back from the pin and used on chip to control the de-
assertion of the data, CS, address and byte enable signals to assure proper timing of the
data hold.
Abbreviation
SYS CLK Rise to Address Valid Delay
WR Rise to Address Output Hold Time
SYS CLK Rise to Data Valid Delay
WR Rise to Data Output Hold Time
SYS CLK Rise to CS Assertion Delay
WR Rise to CS Deassertion Hold Time
SYS CLK Rise to WR Assertion Delay
SYS CLK Rise to WR Deassertion Hold Time
WAIT Input Pin Assertion to XIN Rise Setup Time
WAIT Input Pin Deassertion to XIN Rise Setup Time
SYS CLK Rise to DMAACK Assertion Delay
SYS CLK Rise to DMAACK Deassertion Hold Time
SYS CLK Rise to BHEN or BLEN Assertion Delay
WR Rise to BHEN or BLEN Deassertion Hold Time
on page 49 and
Table 14
P R E L I M I N A R Y
Figure 11
provide timing information for the external interface
on page 49, it is assumed that the Wait state
Minimum
3
3
3
3
1
1
3
3
Figure 11
Product Specification
Delay (ns)
ZNEO
1/2Tclk +10
External Interface
Maximum
™
on page 49, it is
Z16F Series
10
10
10
10
10
48