TMS470R1B512 AD [Analog Devices], TMS470R1B512 Datasheet - Page 29

• Manufacturer Part Number: TMS470R1B512
• Description: 16/32-Bit RISC Flash Microcontroller
• Manufacturer: AD [Analog Devices]

Switching Characteristics Over Recommended Operating Conditions for External Clocks
(see
(1) X = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}. X is the interface clock divider ratio determined by the PCR0[4:1] bits in the SYS module.
(2) N = {1 to 256}. N is the ECP prescale value defined by the ECPCTRL[7:0] register bits in the ECP module.
(3) CLKOUT/ECLK pulse durations (low/high) are a function of the OSCIN pulse durations when PLLDIS is active.
(4) Clock source bits are selected as either SYSCLK (CLKCNTL[6:5] = 11 binary) or MCLK (CLKCNTL[6:5] = 10 binary).
(5) Clock source bits are selected as ICLK (CLKCNTL[6:5] = 01 binary).
t
t
t
t
w(COL)
w(COH)
w(EOL)
w(EOH)
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Figure 6
and
Pulse duration, CLKOUT low
Pulse duration, CLKOUT high
Pulse duration, ECLK low
Pulse duration, ECLK high
CLKOUT
PARAMETER
ECLK
Figure
7)
t
Figure 6. CLKOUT Timing Diagram
w(EOH)
t
w(COH)
Figure 7. ECLK Timing Diagram
SYSCLK or MCLK
ICLK: X is even or 1
ICLK: X is odd and not 1
SYSCLK or MCLK
ICLK: X is even or 1
ICLK: X is odd and not 1
N is even and X is even or odd
N is odd and X is even
N is odd and X is odd and not 1
N is even and X is even or odd
N is odd and X is even
N is odd and X is odd and not 1
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TEST CONDITIONS
(4)
(4)
t
(5)
(5)
t
w(EOL)
w(COL)
(5)
(5)
16/32-Bit RISC Flash Microcontroller
SPNS107A – SEPTEMBER 2005 – REVISED AUGUST 2006
0.5t
0.5t
0.5t
0.5t
c(ICLK)
c(ECLK)
c(ECLK)
c(ICLK)
0.5t
0.5t
0.5t
0.5t
0.5t
0.5t
0.5t
0.5t
c(ECLK)
c(ECLK)
c(ECLK)
c(ECLK)
c(ICLK)
c(ICLK)
+ 0.5t
c(SYS)
c(SYS)
– 0.5t
MIN
+ 0.5t
– 0.5t
c(SYS)
– t
c(SYS)
– t
– t
– t
c(SYS)
c(SYS)
– t
– t
– t
– t
f
r
f
r
f
f
r
r
– t
– t
– t
– t
r
f
f
r
TMS470R1B512
MAX
(1) (2) (3)
UNIT
ns
ns
ns
ns
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