AT90USB1286-16MU ATMEL [ATMEL Corporation], AT90USB1286-16MU Datasheet - Page 32

• Manufacturer Part Number: AT90USB1286-16MU
• Description: Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
• Manufacturer: ATMEL [ATMEL Corporation]

32
AT90USB64/128
Figure 5-7.
Note:
Figure 5-8.
Note:
System Clock (CLK
System Clock (CLK
DA7:0 (XMBK = 0)
DA7:0 (XMBK = 1)
1. SRWn1 = SRW11 (upper sector) or SRW01 (lower sector), SRWn0 = SRW10 (upper sector) or
1. SRWn1 = SRW11 (upper sector) or SRW01 (lower sector), SRWn0 = SRW10 (upper sector) or
DA7:0 (XMBK = 0)
DA7:0 (XMBK = 1)
SRW00 (lower sector).
The ALE pulse in period T5 is only present if the next instruction accesses the RAM (internal
or external).
SRW00 (lower sector).
The ALE pulse in period T6 is only present if the next instruction accesses the RAM (internal
or external).
External Data Memory Cycles with SRWn1 = 0 and SRWn0 = 1
External Data Memory Cycles with SRWn1 = 1 and SRWn0 = 0
DA7:0
A15:8
DA7:0
A15:8
CPU
ALE
CPU
WR
ALE
RD
WR
RD
)
)
Prev. addr.
Prev. data
Prev. data
Prev. data
Prev. addr.
Prev. data
Prev. data
Prev. data
T1
T1
Address
Address
Address
Address
Address
Address
T2
T2
XX
XX
Address
Address
T3
T3
Data
Data
Data
Data
Data
Data
T4
T4
(1)
(1)
T5
T5
7593A–AVR–02/06