13 rom timing (c280x only) – Texas Instruments TMS320F2802 User Manual
Page 133
+
ƪ
ǒ
t
a(rp)
t
c(SCO)
Ǔ
*
1
ƫ
(round up to the next highest integer) or 0, whichever is larger
+
ƪ
ǒ
t
a(rr)
t
c(SCO)
Ǔ
*
1
ƫ
(round up to the next highest integer) or 1, whichever is larger
ROM Page Wait-State
ROM Random Wait-State
,
,
,
SPRS230N – OCTOBER 2003 – REVISED MAY 2012
6.13 ROM Timing (C280x only)
Table 6-48. ROM/OTP Access Timing
PARAMETER
MIN
TYP
MAX
UNIT
t
a(rp)
Paged ROM access time
19
ns
t
a(rr)
Random ROM access time
19
ns
t
a(ROM)
ROM (OTP area) access time
(1)
60
ns
(1)
In C280x devices, a 1K X 16 ROM block replaces the OTP block found in Flash devices.
Equations to compute the page wait-state and random wait-state in
are as follows:
Table 6-49. ROM/ROM (OTP area) Minimum Required
Wait-States at Different Frequencies
SYSCLKOUT
SYSCLKOUT
PAGE WAIT-
RANDOM WAIT-
(MHz)
(ns)
STATE
STATE
(1)
100
10
1
1
75
13.33
1
1
50
20
0
1
30
33.33
0
1
25
40
0
1
15
66.67
0
1
4
250
0
1
(1)
Random wait-state must be greater than or equal to 1.
Copyright © 2003–2012, Texas Instruments Incorporated
Electrical Specifications
133
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