mm912f634 Freescale Semiconductor, Inc, mm912f634 Datasheet - Page 177

• Manufacturer Part Number: mm912f634
• Description: Mm912f634 - Integrated S12 Based Relay Driver With Lin
• Manufacturer: Freescale Semiconductor, Inc

Functional Description and Application Information
Table 243. DIRECT Field Descriptions
Freescale Semiconductor
DP[15:8]
Field
7–0
MOVB
LDY
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
Example 1. This Example Demonstrates Usage of the Direct Addressing Mode
#0x80,DIRECT
<00
Bit17
Bit16
Bit15
Figure 50. Direct Address Mapping
;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
;many cases assemblers are “direct page aware” and can
;automatically select direct mode.
Global Address [17:0]
DP [15:8]
Description
CPU Address [15:0]
Figure
Bit8
50).
Bit7
Memory Mapping Control (S12SMMCV1)
Bit0
MM912F634
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