User Guide

RM-11
System Module CC Technical Documentation
Page 14 ©2004 Nokia Corporation Confidential Issue 1 02/2004
Figure 8: Color LCD module
RF Interface Block
The interface between the baseband and the RF module can be divided into two
categories: the digital interface and the analog interface. The digital interface is between
the UPP and the RF chip. The serial digital interface is used to control the operation of
the different blocks in the RF chip. The analog interface is between the UEM and the RF.
The entire BB-RF interface is discussed in the RF-BB Interface Specification RH-27
document.
Combo Memory Module
The RM-11 baseband memory module consists of a combo Flash/SRAM chip. It has
128 Mbit burst-type flash memory and 8Mbit of SRAM. In addition, the UPP has 8Mbits
of internal RAM. The UPP RAM is part of the UPP and is not discussed here.
Combo Memory Interface
The memory interface consists of a multiplexed address/data bus MEMADDA [23:0], the
MEMCONT[9:0] memory control bus, and the GENIO[23], which is used for memory
control. The purpose of the memory interface is to reduce the amount of
interconnections by multiplexing the address and data signals on the same bus. Because
the required Flash address space is more than 16bits, the MEMADDA[15:0] are multi-
plexed address/data lines and MEMADDA[22:16] are only address lines, which in total
allow for 8M addresses (MEMADDA[21:0]). The multiplexed data/address lines require
the memory to store the address during the first cycle in the read/write access. Data
access to the flash is performed as a 16-bit access (MEMADDA[15:0]) in order to improve
the data rate on the bus. The memory interface supports asynchronous read burst mode,
synchronous read, and simultaneous read-while-write/erase — all controlled by the UPP.
SRAM Memory Description
The combo memory chip used in RM-11 has 8 Mbit of SRAM, 16-bits wide running at
1.8 V. It uses a multiplexed address and data bus to minimize the pin count of the device.
Control signals are used to allow byte access to the device.
Active area
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Driver
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