DETAIL OF CONTROL BITS AND REGISTER MAPPING" />
參數(shù)資料
型號： MCZ33905BD3EK
廠商： Freescale Semiconductor
文件頁數(shù)： 82/106頁
文件大小： 0K
描述： IC SBC CAN HS 3.3V 54SOIC
標準包裝： 26
應用： 系統(tǒng)基礎芯片
接口： CAN，LIN
電源電壓： 5.5 V ~ 28 V
封裝/外殼： 54-SSOP（0.295"，7.50mm 寬）裸露焊盤
供應商設備封裝： 54-SOICW-EP
包裝： 管件
安裝類型： 表面貼裝
Analog Integrated Circuit Device Data
Freescale Semiconductor
77
33903/4/5
SERIAL PERIPHERAL INTERFACE
DETAIL OF CONTROL BITS AND REGISTER MAPPING
Entering into LP Mode Using Random Code
- LP mode using Random Code must be selected in INIT
mode via bit 7 of the INIT MISC register.
- In Normal mode, read the Random Code using 0x1D00 or
0x1D80 command. The 3 Random Code bits are available on
MISO bits 2,1 and 0.
- Write LP mode by inverting the 3 random bits.
Example - Select LP VDD OFF without cyclic sense and
FWU:
1. in hex: 0x5C60 to enter in LP VDD OFF mode without
using the 3 random code bits.
2. if Random Code is selected, the commands are:
- Read Random Code: 0x1D00 or 0x1D80,
MISO report in binary: bits 15-8, bits 7-3, Rnd_[2], Rnd_[1],
Rnd_[0].
- Write LP VDD OFF mode, using Random Code inverted:
in binary: 0101 1100 0110 0 Rnd_b[2], Rnd_b[1], Rnd_b[0].
Table 30 summarizes these commands
Table 31 describes MISO bits 7-0, used to decode the
device’s current mode.
Table 32 describes the SAFE and DEBUG bit decoding.
Table 30. Device Modes
Global commands and effects
Read device current mode, Leave debug mode.
Keep SAFE pin as is.
MOSI in hexadecimal: 1D 00
MOSI
bits 15-14
bits 13-9
bit 8
bit 7
bits 6-0
00
01 110
1
0
000 0000
MISO
bit 15-8
bit 7-3
bit 2-0
Fix Status
device current mode
Random code
Read device current mode
Release SAFE pin (turn OFF).
MOSI in hexadecimal: 1D 80
MOSI
bits 15-14
bits 13-9
bit 8
bit 7
bits 6-0
00
01 110
1
000 0000
MISO
bit 15-8
bit 7-3
bit 2-0
Fix Status
device current mode
Random code
Read device current mode, Leave debug mode.
Keep SAFE pin as is.
MOSI in hexadecimal: DD 00
MISO reports Debug and SAFE state (bits 1,0)
MOSI
bits 15-14
bits 13-9
bit 8
bit 7
bits 6-0
11
01 110
1
0
000 0000
MISO
bit 15-8
bit 7-3
bit 2
bit 1
bit 0
Fix Status
device current mode
X
SAFE
DEBUG
Read device current mode, Keep DEBUG mode
Release SAFE pin (turn OFF).
MOSI in hexadecimal: DD 80
MISO reports Debug and SAFE state (bits 1,0)
MOSI
bits 15-14
bits 13-9
bit 8
bit 7
bits 6-0
11
01 110
1
000 0000
MISO
bit 15-8
bit 7-3
bit 2
bit 1
bit 0
Fix Status
device current mode
X
SAFE
DEBUG
Table 31. MISO bits 7-3
Device current mode, any of the above commands
b7, b6, b5, b4, b3
MODE
0 0000
INIT
0 0001
FLASH
0 0010
Normal Request
0 0011
Normal mode
1 XXXX
Low Power mode (Table 29)
Table 32. SAFE and DEBUG status
SAFE and DEBUG bits
b1
description
0
SAFE pin OFF, not activated
1
SAFE pin ON, driver activated.
b0
description
0
Debug mode OFF
1
Debug mode Active
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