S912XET512J3VALR Freescale Semiconductor, S912XET512J3VALR Datasheet - Page 198

• Manufacturer Part Number: S912XET512J3VALR
• Description: 16-bit Microcontrollers - MCU 16 BIT,512K FLASH
• Manufacturer: Freescale Semiconductor

Specifications of S912XET512J3VALR

• Rohs: yes
• Core: HCS12X
• Processor Series: MC9S12XE
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 512 KB
• Data Ram Size: 32 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3.13 V to 5.5 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: LQFP-112
• Mounting Style: SMD/SMT

Chapter 3 Memory Mapping Control (S12XMMCV4)
3.3.2.4
Read: Anytime
Write: anytime in special modes, one time only in other modes.
This register determines the position of the 256 Byte direct page within the memory map.It is valid for both
global and local mapping scheme.
Bits [22:16] of the global address will be formed by the GPAGE[6:0] bits in case the CPU executes a global
instruction in direct addressing mode or by the appropriate local address to the global address expansion
(refer to
198
Address: 0x0011
DP[15:8]
Reset
Field
7–0
W
R
Section 3.4.2.1.1, “Expansion of the Local Address
MOVB
LDY
DP15
Direct Page Index Bits 15–8 — These bits are used by the CPU when performing accesses using the direct
addressing mode. The bits from this register form bits [15:8] of the address (see
Direct Page Register (DIRECT)
Example 3-2. This example demonstrates usage of the Direct Addressing Mode
0
7
XGATE write access to this register during an CPU access which makes use
of this register could lead to unexpected results.
Bit22
#0x80,DIRECT
<00
DP14
0
6
MC9S12XE-Family Reference Manual Rev. 1.25
Table 3-10. DIRECT Field Descriptions
Figure 3-9. DIRECT Address Mapping
Figure 3-8. Direct Register (DIRECT)
Bit16
DP13
Global Address [22:0]
0
5
;Set DIRECT register to 0x80. Write once only.
;Global data accesses to the range 0xXX_80XX can be direct.
;Logical data accesses to the range 0x80XX are direct.
;Load the Y index register from 0x8000 (direct access).
;< operator forces direct access on some assemblers but in
Bit15
CAUTION
DP12
DP [15:8]
0
4
Description
CPU Address [15:0]
Bit8
DP11
Map).
0
3
Bit7
DP10
0
2
Figure
Freescale Semiconductor
Bit0
DP9
3-9).
0
1
DP8
0
0