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| 型號(hào)： | PCA8802U/2AA/1 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PBGA8 |
| 封裝： | 1.19 X 1.14 MM, 0.22 MM HEIGHT, LEAD FREE, WLCSP-8 |
| 文件頁(yè)數(shù)： | 4/34頁(yè) |
| 文件大?。?/td> | 160K |
| 代理商： | PCA8802U/2AA/1 |
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PCA8802_1
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 19 February 2009
12 of 34
NXP Semiconductors
PCA8802
Smartcard RTC
9.5.7.1
Example data transfers
Example 1: Sending the instruction dvs_cmd followed by fst_cmd is shown in Figure 21.
Fig 18. A master-transmitter addresses a slave receiver
Fig 19. A master reads from a slave immediately after the rst byte
001aaj202
A
DATA
A
DATA
P
A/A
SLAVE ADDRESS + write
S
from master to slave
data transferred
(n bytes + acknowledge)
from slave to master
A = acknowledge (SDA LOW)
A = not acknowledge (SDA HIGH)
S = START condition
P = STOP condition
001aaj203
A
DATA
A
DATA
P
SLAVE ADDRESS + read
S
data transferred
(n bytes + acknowledge)
A
(1) Not shaded because transfer direction of data and acknowledge bits depends on R/W bits.
Fig 20. Combined format
001aaj204
A
DATA
P
SLAVE ADDRESS + write or read
S
direction of transfer
may change at this
point
n bytes
+ ack.(1)
n bytes
+ ack.(1)
Sr = repeated START condition
A/A
A
DATA
SLAVE ADDRESS + write or read
Sr
A/A
Wrt_cmd is slave address plus write bit.
Fig 21. Sending instructions
001aaj209
S
1
0
1
0
wrt_cmd
dvs_cmd enable
fst_cmd enable
0
A
0
1
0
1
A
0
1
0
1
A
P
S
START condition
P
STOP condition
A
acknowledge from slave
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