MIC384
Micrel
Register Set and Programmer’s Model
Internal Register Set
Name
TEMP0
Description
Command Byte
Operation
Power-Up Default
measured temperature,
local zone
(1)
00 (0° C)
h
00
8-bit read only
8-bit read/write
8-bit read/write
h
(2)
00
CONFIG
T_HYST0
configuration register
01
h
h
hysteresis setting, local
zone
02
4C (+76° C)
h
h
temperature setpoint, local
zone
T_SET0
TEMP1
03
8-bit read/write
51 (+81° C)
h
h
measured temperature,
zone 1
(1)
00 (0° C)
h
10
8-bit read only
8-bit read/write
8-bit read/write
h
T_HYST1 hysteresis setting, zone 1
12
5C (+92° C)
h
h
temperature setpoint,
T_SET1
zone 1
13
61 (+97° C)
h
h
measured temperature,
(1)
00 (0° C)
h
TEMP2
zone 2
20h
22h
23h
8-bit read only
8-bit read/write
8-bit read/write
T_HYST2 hysteresis setting, zone 2
5C (+92° C)
h
temperature setpoint,
T_SET2
zone 2
61 (+97° C)
h
(1) TEMPx will contain measured temperature data after the completion of one conversion cycle.
(2) After the first Fault_Queue conversions are complete, status bits will be set if TEMPx > T_SETx.
Detailed Register Descriptions
Configuration Register
CONFIGURATION REGISTER (CONFIG)
8-Bit Read/Write
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
read only read only read only
read/write
read/write read/write read/write
zone 0
status
(S0)
zone 1
status
(S1)
zone 2
status
(S2)
fault queue
depth
(FQ[1:0])
interrupt CMP/INT
Shutdown
mask
(IM)
mode
(SHDN)
(MODE)
Bits
S0
Function
Operation
local interrupt status (read only)
1 = event occured, 0 = no event
1 = event occured, 0 = no event
1 = event occured, 0 = no event
S1
remote zone 1 interrupt status (read only)
remote zone 2 interrupt status (read only)
S2
00 = 1 conversion, 01 = 2 conversions,
10 = 4 conversions, 11 = 6 conversions
FQ[1:0] Fault_Queue depth
IM
interrupt mask
1 = disabled, 0 = interrupts enabled
comparator/interrupt
mode selection for /INT pin
1 = interrupt mode,
0 = comparator mode
MODE
normal/shutdown
operating mode selection
1 = shutdown,
0 = normal
SHDN
(*)
CONFIG Power-Up Value: 0000 0000 = 00
b
h
• not in shutdown mode
• comparator mode
• Fault_Queue depth = 1
• interrupts enabled.
• no temperature events pending
CONFIG Command Byte Value: 0000 0001 = 01
b
h
* Following the first Fault_Queue conversions, one or more of the status bits may be set.
MIC384
14
September 2000
MICREL [ MICREL SEMICONDUCTOR ]
