AT697E_09 Datasheet, PDF (143/154 Pages) ATMEL Corporation – Rad-Hard 32 bit SPARC V8 Processor

Figure 59. Fetch, Read and Write from 32-bit PROM - 0 Waitstate
Fetch Inst 0
Load Data
Fetch Inst 1
Write Data
SYSCLK
t10
A[27:0]
t16
ROM S0*
t15
OE*
WRIT E*
t15
READ
D[31:0]
CB[7:0]
Inst Addr 0
t16
t10
Data Addr 0
t16
t16
t10
Inst Addr 1
t16
t16
t10
Data Addr 1
t16
t16
t15
t15
t15
t15
t15
t15
t15
t15
t15
t15
t15
t15
t13
t12
Inst 0
t13
t12
CB In
t13
t12
Data
t13
t12
CB
t13
t12
Inst 1
t13
t12
CB In
t11
t14
WData
t11
t14
WCB
Figure 60. Fetch, Read and Write from 32-bit PROM - n Waitstates
SYSCLK
A[27:0]
ROM S0*
OE*
WRIT E*
READ
D[31:0]
CB[7:0]
Fetch Inst 0
n WS
t3
t10
t10
Inst Addr 0
t16
t16 t16
t15
t15 t15
t15
t15 t15
t13
t12
Inst
t13
t12
CB
Load Data
n WS
Fetch Inst 1
n WS
t10
Data Addr 1
t16 t16
t10
Inst Addr 1
t16 t16
t15 t15
t15
t15 t15
t13
t12
Dat
t13
t12
CB
t15
t13
t12
Inst
t13
t12
CB
Write Data
n WS
Data Addr 2
t16
t15
t15
t11
t14
WData
t11
t14
WCB
142 AT697E
4226G–AERO–05/09