EM773FHN33 NXP Semiconductors, EM773FHN33 Datasheet - Page 38

• Manufacturer Part Number: EM773FHN33
• Description: The EM773 is an ARM Cortex-M0 based, low-cost 32-bit energy metering IC, designed for 8/16-bit smart metering applications
• Manufacturer: NXP Semiconductors

NXP Semiconductors
[1]
[2]
EM773
Product data sheet
Table 14.
[3]
[4]
Symbol
SPI slave (in SPI mode)
T
t
t
t
t
DS
DH
v(Q)
h(Q)
cy(PCLK)
T
main clock frequency f
and the SPI CPSDVSR parameter (specified in the SPI clock prescale register).
T
T
T
cy(clk)
amb
cy(clk)
amb
= 40 C to 85 C.
= 25 C; for normal voltage supply range: V
= (SSPCLKDIV  (1 + SCR)  CPSDVSR) / f
= 12  T
Dynamic characteristics of SPI pins in SPI mode
Parameter
PCLK cycle time
data set-up time
data hold time
data output valid time in SPI mode
data output hold time in SPI mode
cy(PCLK)
main
.
Fig 20. SPI master timing in SPI mode
, the SPI peripheral clock divider (SSPCLKDIV), the SPI SCR parameter (specified in the SSP0CR0 register),
SCK (CPOL = 0)
SCK (CPOL = 1)
Conditions
in SPI mode
in SPI mode
MOSI
MISO
MOSI
MISO
All information provided in this document is subject to legal disclaimers.
DD
main
= 3.3 V.
Rev. 2 — 3 January 2012
DATA VALID
DATA VALID
. The clock cycle time derived from the SPI bit rate T
t
v(Q)
[3][4]
[3][4]
[3][4]
[3][4]
DATA VALID
T
DATA VALID
cy(clk)
Min
20
0
3  T
-
-
t
v(Q)
t
DS
DATA VALID
cy(PCLK)
DATA VALID
t
clk(H)
t
t
DH
DS
+ 4
DATA VALID
DATA VALID
Typ
-
-
-
-
-
t
clk(L)
t
DH
t
h(Q)
Max
-
-
-
3  T
2  T
t
cy(PCLK)
cy(PCLK)
h(Q)
cy(clk)
Energy metering IC
© NXP B.V. 2012. All rights reserved.
is a function of the
+ 11
+ 5
EM773
CPHA = 1
CPHA = 0
002aae829
38 of 51
Unit
ns
ns
ns
ns
ns