CY14B101P(2011) Ver la hoja de datos (PDF) - Cypress Semiconductor
Número de pieza
componentes Descripción
Fabricante
CY14B101P
(Rev.:2011)
(Rev.:2011)
Cypress Semiconductor
CY14B101P Datasheet PDF : 35 Pages
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PRELIMINARY
CY14B101P
CS
SCK
SI
Figure 11. Burst Mode Read Instruction Timing
01 2 3 456 7 01 2 3 45 6 7
20 21 22 23 0 1 2 3 4 5 6 7 0 7 0 1 2 3 4 5 6 7
Op-Code
17-bit Address
0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 A16
MSB
A3 A2 A1 A0
LSB
Data Byte 1
Data Byte N
SO
D7 D6 D5 D4 D3 D2 D1 D0 D7 D0 D7 D6 D5 D4 D3 D2 D1 D0
MSB
LSB
MSB
LSB
Figure 12. Write Instruction Timing
CS
SCK
SI
SO
0 1 2 34 5 67 0 1 23 4 56 7
20 21 22 23 0 1 2 3 4 5 6 7
00
Op-Code
0000100 00
MSB
00
17-bit Address
0 0 A16
HI-Z
A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
LSB MSB
Data
LSB
Figure 13. Burst Mode Write Instruction Timing
CS
SCK
SI
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 20 21 22 23 0 1 2 3 4 5 6 7 0 7 0 1 2 3 4 5 6 7
Data Byte 1
Data Byte N
Op-Code
17-bit Address
0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 A16 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D0 D7 D6 D5 D4 D3 D2 D1 D0
MSB
LSB MSB
LSB
SO
HI-Z
RTC Access
CY14B101P uses 16 registers for RTC. These registers can be
read out or written to by accessing all 16 registers in burst mode
or accessing each register, one at a time. The RDRTC and
WRTC instructions are used to access the RTC.
All the RTC registers can be read in burst mode by issuing the
RDRTC instruction and reading all 16 bytes without bringing the
CS pin HIGH. The ‘R’ bit must be set while reading the RTC
timekeeping registers to ensure that transitional values of time
are not read.
Writes to the RTC register are performed using the WRTC
instruction. Writing RTC timekeeping registers and control
registers, except for the flags register needs the ‘W’ bit of the
flags register to be set to ‘1’. The internal counters are updated
with the new date and time setting when the ‘W’ bit is cleared to
‘0’. All the RTC registers can also be written in burst mode using
the WRTC instruction.
Document #: 001-61932 Rev. *B
Page 12 of 35
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