ES51963
4 1/2 DMM
Format 2:
mode 1: ES51963 sends the status and counts ( counter from DINT ) to uP.
16/100 conversion time
16/100 conversion time
(V-)+2.1V
EOC (O)
(V-)+0.8V
T=(32~512)Tosc1
44/100
(V-)+2.1V
(V-)+0.8V
(V-)+2.1V
conversion time
SCLK (I)
status & counts
STATUS (O)
(V-)+0.8V
O: output to microprocessor
I: input into IC
Note: 1. Serial Data Format (STATUS):
The serial data includes output count (D0~D15, unsigned 16 bits) and
status (S0~S15, 16 bits). The definition of status' format is as same as format 1
and the order of sent/received sequence is D0, D1, … , D15, S0, S1, … , S15.
Note that the maximum output count depends on the conversion rate defined by
(C2, C1, C0). The maximum counts with various conversion rate are listed as
follow:
C 2 C 1 C 0
Fcount
fosc1 / 2
fosc1 / 2
fosc1 / 2
fosc1 / 4
fosc1 / 8
fosc1 / 10
fosc1 / 20
fosc1 / 40
Maximum count
8800
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
11000
22000
22000
22000
22000
22000
22000
Note: (1) Fcount : the frequency of counter.
(2) In above bold letters, because the fastest frequency of counter is
restricted, the resolution will be proportional decreased as
conversion rates increased.
2. The detail timing between SCLK and STATUS is as follow:
(32~512)Tosc1 with 40~60 % duty cycle
(V-) + 2.1V
SCLK
(V-) + 0.8V
(V-) + 2.1V
STATUS
D0
D1
S0
S15
D15
mode 2: The communication protocol is the same as mode 2 of format 1.
13
2003/9/1
CYRUSTEK [ Cyrustek corporation ]
