S912XET256J2VAGR Freescale Semiconductor, S912XET256J2VAGR Datasheet - Page 463

• Manufacturer Part Number: S912XET256J2VAGR
• Description: 16-bit Microcontrollers - MCU Watchdog OSC/Timer -40 C to + 105 C HCS12X MCU SPI
• Manufacturer: Freescale Semiconductor

Specifications of S912XET256J2VAGR

• Core: HCS12X
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 16 KB
• On-chip Adc: Yes
• Package / Case: LQFP
• Mounting Style: SMD/SMT
• A/d Bit Size: 12 bit
• A/d Channels Available: 24
• Interface Type: CAN, SCI, SPI
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 119
• Number Of Timers: 25
• Program Memory Type: Flash
• Supply Voltage - Max: 1.98 V, 2.9 V, 5.5 V
• Supply Voltage - Min: 1.72 V, 2.7 V, 3.13 V

10.9
10.9.1
The recommended initialization of the XGATE is as follows:
The following code example implements the XGATE initialization sequence.
10.9.2
SCI_REGS
SCIBDH
SCIBDL
SCICR2
SCISR1
SCIDRL
TIE
TE
RE
Freescale Semiconductor
Arithmetic Immediate Instructions
1. Clear the XGE bit to suppress any incoming service requests.
2. Make sure that no thread is running on the XGATE. This can be done in several ways:
3. Set the XGVBR register to the lowest address of the XGATE vector space.
4. Clear all Channel ID flags.
5. Copy XGATE vectors and code into the RAM.
6. Initialize the S12X_INT module.
7. Enable the XGATE by setting the XGE bit.
SUBL RD, #IMM8
SUBH RD, #IMM8
CMPL RS, #IMM8
CPCH RS, #IMM8
ADDL RD, #IMM8
ADDH RD, #IMM8
LDL RD, #IMM8
LDH RD, #IMM8
a) Poll the XGCHID register until it reads $00. Also poll XGDBG and XGSWEF to make sure
b) Enter Debug Mode by setting the XGDBG bit. Clear the XGCHID register. Clear the XGDBG
The recommended method is a).
Initialization and Application Information
that the XGATE has not been stopped.
bit.
Initialization
Code Example (Transmit "Hello World!" on SCI)
Functionality
CPU
;###########################################
;#
;###########################################
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
Table 10-24. Instruction Set Summary (Sheet 3 of 3)
MC9S12XE-Family Reference Manual Rev. 1.25
S12X
$00C8
SCI_REGS+$00;
SCI_REGS+$00
SCI_REGS+$03
SCI_REGS+$04
SCI_REGS+$07
$80
$08
$04
15
1
1
1
1
1
1
1
1
14
1
1
1
1
1
1
1
1
13
0
0
0
0
1
1
1
1
SYMBOLS
;SCI register space
;SCI Baud Rate Register
;SCI Baud Rate Register
;SCI Control Register 2
;SCI Status
;SCI Control Register 2
;TIE bit mask
;TE bit mask
;RE bit mask
12
0
0
1
1
0
0
1
1
11
0
1
0
1
0
1
0
1
10
RD
RD
RD
RD
RD
RD
RS
RS
9
Register 1
8
7
#
6
Chapter 10 XGATE (S12XGATEV3)
5
4
IMM8
IMM8
IMM8
IMM8
IMM8
IMM8
IMM8
IMM8
3
2
1
463
0